Invert two sides of if expression in SET to avoid a lookup.
Invert two sides of if expression in SET to avoid a lookup.

Because of the short circuit behavior of && inverting the two sides of
the if expression avoids an hash table lookup if the non-EX variant of
SET is called.

Thanks to Weibin Yao (@yaoweibin on github) for spotting this.

jbochi/redis,dramenk/annotated_redis_source,mumingv/redis,maodeyi/redis_lua,buobao/redis-3.0-annotated,elkingtonmcb/redis,sunlianqiang/redis-3.0-annotated,a-pavlov/redis,GrimDerp/redis,zhcy/redis,Aaron1992/redis,cloudrain21/redis,Aliceljm1/redis-3.0-annotated,honestme/redis,dayuoba/redis,wenxueliu/redis_comment,shreesundara/redis,rogerlz/redis,viongpanzi/annotated_redis_source,hedisdb/hedis,qiyang0221/redis,tanghaodong25/redis,mumingv/redis,blackmady/redis,mverrilli/redis,jermnelson/redis,ttuna/msot-redis,colstrom/redis,xuguruogu/redis,narma/redis,danny200309/annotated_redis_source,StevenTsai/redis,zy416548283/redis-3.0-annotated,HeartSaVioR/redis,wuyu201321060203/redis-3.0-annotated,modulexcite/redis,july2993/redis,valdsJohn/redis,mverrilli/redis,RepmujNetsik/redis,soveran/redis,darksideofthemoo/redis-histogram,josiahcarlson/redis,0x55/redis-3.0-annotated,iandyh/redis,jackyan/redis,MSOpenTech/redis,saisai/redis,190235047/redis,supasate/redis,hedisdb/hedis,ErikDubbelboer/redis,harrisonfeng/redis,pietern/redis,flashbuckets/redis,moonbingbing/redis-3.0-annotated,zczhuohuo/redis,timothyohare/3rdPartySrc-redis,francischan714/redis,wprice/redis,pkdevbox/redis,jasonkying/redis,spearhead-ea/redis,jbochi/redis,neomantra/redis,tzq668766/redis-3.0-annotated,MOON-CLJ/redis,linfangrong/redis,hgl888/redis,wenxueliu/redis_comment,SyntaxStacks/redis,himoca/redis,ituncle/redis,SummonY/redis,timothyohare/3rdPartySrc-redis,z-fork/redis,ouyangkongtong/redis,colstrom/redis,duanx/redis,ramonsnir/redis,wenxueliu/redis_comment,CodeJuan/redis,kaushik94/redis,alenslan/redis,twskipper/redis,jermnelson/redis,huangz1990/experiment-redis,riyan8250/redis,rouzier/redis,danny200309/annotated_redis_source,CodeJuan/redis,dongqifan2/redis-3.0-annotated,kensou97/redis,rouzier/redis,ttuna/msot-redis,soloestoy/redis,xuzhezhaozhao/redis_reading,shining-yang/redis,mcanthony/redis,ipmobiletech/redis,nuxeh/redis,gongice/redis-3.0-annotated,SummonY/redis,ouyangkongtong/redis,rogerlz/redis,jingjidejuren/redis,mumingv/redis-3.0-annotated,neomantra/redis,jasonkying/redis,nilyang/redis-tdd-annotation,nilyang/redis-tdd-annotation,tanghaodong25/redis,jackyan/redis,AALEKH/redis,mengzhejin/RedisStudy,janekmi/redis,yuzhangjob/redis-3.0-annotated-unstable,mcanthony/redis,PradheepShrinivasan/redis,RepmujNetsik/redis,PradheepShrinivasan/redis,louisliangjun/redis,pietern/redis,kmiku7/redis,takeshineshiro/redis,seppo0010/rlite-server,kmiku7/redis,ttuna/msot-redis,4396/redis,h0x91b/redis,j0hnma/szredis,janekmi/redis,csuhawk/redis,louisliangjun/redis,fengshao0907/redis-3.0-annotated,jbochi/parallel_redis,guker/redis,ofirluzon/redis,yybirdcf/learn-redis,jackyan/redis,antirez/redis,honestme/redis,miaoyc1989/redis-3.0-annotated,jacklee0810/annotated_redis_source,mattsta/redis,valdsJohn/redis,h0x91b/redis,pedigree/redis,pedigree/redis,huyuezheng/redis,saisai/redis,WorkingOfTimtohyZhang/redis-3.0-annotated,dayuoba/redis,rogerchina/redis,soloestoy/redis,shreesundara/redis,netroby/redis,YongMan/redis,LongXQ/redis,izhoujie/redis,hgl888/redis,gilala/bjredis,sunlianqiang/redis-3.0-annotated,arijitvt/redis,0x20h/redis,josiahcarlson/redis,fengshao0907/redis,takeshineshiro/redis,GrimDerp/redis,fankeke/redis-3.0-annotated,itamarhaber/redis,rogerchina/redis,pmem/redis,Sciumo/redis,ytjiang/redis,Aaron1992/redis,wprice/redis,iandyh/redis,whille/redis-3.0-annotated,SyntaxStacks/redis,clamoriniere1A/redis,ipmobiletech/redis,ketor/redis,hornen/redis,seppo0010/redis,huangz1990/annotated_redis_source,msn217/redis-3.0-annotated,ipmobiletech/redis,wujf/redis,blackmady/redis,twskipper/redis,YuanZhewei/redis,wangyikai/redis,seppo0010/redis,LongXQ/redis,onlymellb/redis-3.0-annotated,simplestbest/redis,huyuezheng/redis,izhoujie/redis,machicao2013/redis-source-annotated,YongMan/redis,abhiklodh/redis,mgk/redis,neomantra/redis,yuzhangjob/redis-3.0-annotated-unstable,cusspvz/redis,kmiku7/redis,weizijun/redis,mcanthony/redis,francischan714/redis,wujf/redis,seandsky/redis,brg-liuwei/redis,gilala/hbjredis,SyntaxStacks/redis,jingjidejuren/redis,iandyh/redis,wbailey5/redis,msn217/redis-3.0-annotated,YongMan/redis,charsyam/redis,adamweixuan/redis-3.0-annotated,0x55/redis-3.0-annotated,twskipper/redis,allengaller/redis,j0hnma/szredis,haima-zju/redis-3.0-annotated,louisliangjun/redis,YuraLukashik/redis,mgk/redis,izhoujie/redis,kmiku7/redis,Hailei/redis,tidatida/annotated_redis_source,antirez/redis,sunheehnus/redis,jasonkying/redis,abhiklodh/redis,wuxiaowei907/annotated_redis_source,kaushik94/redis,MSOpenTech/redis,itamarhaber/redis,kensou97/redis,july2993/redis,jacklee0810/annotated_redis_source,HouKangkang/redis-3.0-annotated,cloudrain21/redis,Wangyao14cyy/redis,zhcy/redis,harrisonfeng/redis,shining-yang/redis,sunlianqiang/redis-3.0-annotated,holstvoogd/redis,z-fork/redis,j0hnma/hszredis,gilala/hredis,qiyang0221/redis,pedigree/redis,dreamquster/redis,netroby/redis,PKRoma/redis,kensou97/redis,fengshao0907/redis-3.0-annotated,fengshao0907/annotated_redis_source,tellapart/redis,CodeJuan/redis,universsky/redis,itugs/redis,4396/redis,gaoxianglong/redis,huangz1990/annotated_redis_source,moonbingbing/redis-3.0-annotated,magastzheng/redis-3.0-annotated,jacklee0810/redis-3.0-annotated,PKRoma/redis,ChaosCoo/annotated_redis_source,hhli/redis,xuguruogu/redis,zczhuohuo/redis,AplayER/redis,pietern/redis,Soledad89/redis,CodeJuan/redis,taoguan/redis,Cisphyx/redis-websockets,fengshao0907/redis,linfangrong/redis,programmecat/redis,j0hnma/szredis,ramonsnir/redis,Aaron1992/redis,gilala/hredis,ton31337/redis,unasm/redis-3.0-annotated,shreesundara/redis,citusdata/redis,zhiliaoniu/redis,jbochi/parallel_redis,mingyaaaa/redis,ChaosCoo/annotated_redis_source,HeartSaVioR/redis,nilyang/redis-tdd-annotation,netroby/redis,tjschuck/redis,devaos/redis,rogerlz/redis,dayuoba/redis,Sciumo/redis,allengaller/redis,idning/redis,LongXQ/redis,charsyam/redis,Wangyao14cyy/redis,mpalmer/redis,healerkx/redis,universsky/redis,zhoudayang/redis,Cisphyx/redis-websockets,thomasdarimont/redis,yossigo/redis,j0hnma/hszredis,dayuoba/redis,mverrilli/redis,Markgorden/redis,hawkchch/redis,idning/redis,hornen/redis,gilala/hbjredis,Soledad89/redis,janekmi/redis,rouzier/redis,tjschuck/redis,ofirluzon/redis,RepmujNetsik/redis,zhaobo1023/redis-3.0-annotated,spinlock/redis,roth1002/redis,roth1002/redis,flashbuckets/redis,kensou97/redis,atreeyang/redis,Hailei/redis,AplayER/redis,hhli/redis,netroby/redis,OmarQunsul/graph-redis,nuxeh/redis,neomantra/redis,ouyangkongtong/redis,valdsJohn/redis,roth1002/redis,viongpanzi/annotated_redis_source,itamarhaber/redis,j0hnma/szredis,zhaobo1023/redis-3.0-annotated,universsky/redis,gilala/hredis,fankeke/redis-3.0-annotated,miaoyc1989/redis-3.0-annotated,YuanZhewei/redis,cnbin/redis,ksarch-saas/redis,gongice/redis-3.0-annotated,magastzheng/redis-3.0-annotated,takeshineshiro/redis,xujunhai1991/redis,Aliceljm1/redis-3.0-annotated,190235047/redis,mengzhejin/RedisStudy,danny200309/annotated_redis_source,HeartSaVioR/redis,MasahikoSawada/redis,seppo0010/redis,ksarch-saas/redis,gilala/redis,mattsta/redis,PKRoma/redis,ofirluzon/redis,Aliceljm1/redis,flashbuckets/redis,rrsean/redis-3.0-annotated,mengyou0304/redis,wuyu201321060203/redis-3.0-annotated,nnog/redis,mumingv/redis,mengyou0304/redis,wuxiaowei907/annotated_redis_source,valdsJohn/redis,RepmujNetsik/redis,190235047/redis,huangz1990/experiment-redis,harrisonfeng/redis,huyuezheng/redis,dongqifan2/redis-3.0-annotated,190235047/redis,spinlock/redis,twskipper/redis,blackmady/redis,StevenTsai/redis,josiahcarlson/redis,charsyam/redis,AALEKH/redis,yybirdcf/learn-redis,guker/redis,seppo0010/rlite-server,adamweixuan/redis-3.0-annotated,brg-liuwei/redis,arijitvt/redis,seppo0010/rlite-server,WorkingOfTimtohyZhang/redis-3.0-annotated,wbailey5/redis,charsyam/redis,allengaller/redis,tidatida/annotated_redis_source,yuhc/redis-benchmark-enhanced,ErikDubbelboer/redis,colstrom/redis,MSOpenTech/redis,zguangyu/redis,clamoriniere1A/redis,jxwr/redis,duanx/redis,davidradunz/redis,JoeWoo/redis,msn217/redis-3.0-annotated,zhiliaoniu/redis,holstvoogd/redis,magastzheng/redis-3.0-annotated,Cisphyx/redis-websockets,HouKangkang/redis-3.0-annotated,NBSW/redis,zhiliaoniu/redis,Aliceljm1/redis,csuhawk/redis,kaushik94/redis,cusspvz/redis,honestme/redis,h0x91b/redis,machicao2013/redis-source-annotated,splitice/redis,zguangyu/redis,taoguan/redis,PKRoma/redis,mumingv/redis-3.0-annotated,fengshao0907/annotated_redis_source,yossigo/redis,jackyan/redis,xujunhai1991/redis,mverrilli/redis,vincent-vivian-liu/redis,healerkx/redis,gaoxianglong/redis,itugs/redis,unasm/redis-3.0-annotated,mpalmer/redis,mpalmer/redis,hgl888/redis,gspandy/annotated_redis_source,holstvoogd/redis,huangz1990/experiment-redis,xlzhan/redis,ytjiang/redis,GitHubMota/redis,YuraLukashik/redis,xlzhan/redis,h0x91b/redis,HunanTV/redis,ton31337/redis,Sciumo/redis,PradheepShrinivasan/redis,zczhuohuo/redis,PradheepShrinivasan/redis,clamoriniere1A/redis,wangyikai/redis,neomantra/redis,soveran/redis,qiyang0221/redis,mengzhejin/RedisStudy,gilala/redis,zhoudayang/redis,mumingv/redis,j0hnma/hszredis,aim-for-better/redis,devaos/redis,ErikDubbelboer/redis,abhiklodh/redis,gilala/bjredis,zguangyu/redis,narma/redis,xuzhezhaozhao/redis_reading,takeshineshiro/redis,pkdevbox/redis,ituncle/redis,mgk/redis,machicao2013/redis-source-annotated,huangz1990/redis-3.0-annotated,MOON-CLJ/redis,GitHubMota/redis,darksideofthemoo/redis-histogram,francischan714/redis,pietern/redis,unasm/redis-3.0-annotated,oranagra/redis,citusdata/redis,yuzhangjob/redis-3.0-annotated-unstable,SummonY/redis,wangyikai/redis,OmarQunsul/graph-redis,jxwr/redis,wprice/redis,Soledad89/redis,Markgorden/redis,Aaron1992/redis,a-pavlov/redis,a-pavlov/redis,qiyang0221/redis,miaoyc1989/redis-3.0-annotated,huangz1990/redis-3.0-annotated,soveran/redis,ofirluzon/redis,elkingtonmcb/redis,mengyou0304/redis,Hailei/redis,0x55/redis-3.0-annotated,wbailey5/redis,yybirdcf/learn-redis,elkingtonmcb/redis,gechong/redis-3.0-annotated,ReadCode/redis-3.0-annotated,spearhead-ea/redis,OmarQunsul/graph-redis,ksarch-saas/redis,rogerchina/redis,cnbin/redis,HunanTV/redis,JoeWoo/redis,thomasdarimont/redis,Soledad89/redis,soloestoy/redis,maodeyi/redis_lua,gechong/redis-3.0-annotated,gaoxianglong/redis,atreeyang/redis,nilyang/redis-tdd-annotation,Aliceljm1/redis,viongpanzi/annotated_redis_source,jacklee0810/annotated_redis_source,gaoxianglong/redis,oranagra/redis,yossigo/redis,gilala/hbjredis,ipmobiletech/redis,HeartSaVioR/redis,saisai/redis,ton31337/redis,oranagra/redis,gilala/redis,YuanZhewei/redis,GitHubMota/redis,dramenk/annotated_redis_source,modulexcite/redis,mpalmer/redis,mumingv/redis-3.0-annotated,weizijun/redis,seandsky/redis,atreeyang/redis,narma/redis,tidatida/annotated_redis_source,oranagra/redis,ituncle/redis,simplestbest/redis,wangyikai/redis,wuyu201321060203/redis-3.0-annotated,antirez/redis,zhoudayang/redis,simplestbest/redis,maodeyi/redis_lua,AALEKH/redis,vincent-vivian-liu/redis,flashbuckets/redis,wuyu201321060203/redis-3.0-annotated,darksideofthemoo/redis-histogram,csuhawk/redis,himoca/redis,tzq668766/redis-3.0-annotated,ChanningDuan/annotated_redis_source,citusdata/redis,modulexcite/redis,NBSW/redis,rrsean/redis-3.0-annotated,mcanthony/redis,ncopa/redis,devaos/redis,Sciumo/redis,mingyaaaa/redis,itugs/redis,gilala/hredis,abhiklodh/redis,nnog/redis,jingjidejuren/redis,0x20h/redis,ctripcorp/redis,hedisdb/hedis,nuxeh/redis,drinkthere/redis-3.0-annotated,badboy/redis,allengaller/redis,seppo0010/redis,vincent-vivian-liu/redis,xuzhezhaozhao/redis_reading,gspandy/annotated_redis_source,dongqifan2/redis-3.0-annotated,MOON-CLJ/redis,ttuna/msot-redis,himoca/redis,tjschuck/redis,tanghaodong25/redis,jbochi/redis,ctripcorp/redis,citusdata/redis,shshlzh/redis-3.0-annotated,jbochi/parallel_redis,buobao/redis-3.0-annotated,badboy/redis,Cisphyx/redis-websockets,pkdevbox/redis,j0hnma/hszredis,seppo0010/rlite-server,shining-yang/redis,huangz1990/experiment-redis,xuguruogu/redis,nuxeh/redis,0x55/redis-3.0-annotated,zy416548283/redis-3.0-annotated,badboy/redis,wbailey5/redis,idning/redis,taoguan/redis,tanghaodong25/redis,pmem/redis,programmecat/redis,slfs007/mk-redis,yybirdcf/learn-redis,hornen/redis,universsky/redis,YuanZhewei/redis,nnog/redis,simplestbest/redis,mengyou0304/redis,buobao/redis-3.0-annotated,YuraLukashik/redis,drinkthere/redis-3.0-annotated,shreesundara/redis,zhcy/redis,csuhawk/redis,jxwr/redis,linfangrong/redis,badboy/redis,cnbin/redis,hedisdb/hedis,linfangrong/redis,roth1002/redis,ketor/redis,shshlzh/redis-3.0-annotated,ncopa/redis,timothyohare/3rdPartySrc-redis,timothyohare/3rdPartySrc-redis,MasahikoSawada/redis,OmarQunsul/graph-redis,davidradunz/redis,huangz1990/redis-3.0-annotated,zhaobo1023/redis-3.0-annotated,hawkchch/redis,vincent-vivian-liu/redis,mgk/redis,davidradunz/redis,ncopa/redis,yuhc/redis-benchmark-enhanced,huyuezheng/redis,hawkchch/redis,fankeke/redis-3.0-annotated,zguangyu/redis,fengshao0907/redis,cloudrain21/redis,Aliceljm1/redis,taoguan/redis,tjschuck/redis,sunheehnus/redis,tellapart/redis,pcarrier/redis,zhcy/redis,z-fork/redis,dreamquster/redis,wenxueliu/redis_comment,rogerlz/redis,NBSW/redis,0x20h/redis,LongXQ/redis,ytjiang/redis,iandyh/redis,Markgorden/redis,StevenTsai/redis,idning/redis,jacklee0810/redis-3.0-annotated,JoeWoo/redis,4396/redis,louisliangjun/redis,programmecat/redis,wujf/redis,gilala/bjredis,z-fork/redis,rogerchina/redis,zczhuohuo/redis,oranagra/redis,hgl888/redis,ketor/redis,july2993/redis,haima-zju/redis-3.0-annotated,4396/redis,Wangyao14cyy/redis,zy416548283/redis-3.0-annotated,HunanTV/redis,nnog/redis,yuhc/redis-benchmark-enhanced,whille/redis-3.0-annotated,onlymellb/redis-3.0-annotated,pcarrier/redis,sunheehnus/redis,alenslan/redis,slfs007/mk-redis,gilala/redis,brg-liuwei/redis,yossigo/redis,ofirluzon/redis,elkingtonmcb/redis,MSOpenTech/redis,figoxu/annotated_redis_source,mengzhejin/RedisStudy,alenslan/redis,gspandy/annotated_redis_source,itamarhaber/redis,josiahcarlson/redis,pcarrier/redis,xujunhai1991/redis,SyntaxStacks/redis,sunheehnus/redis,machicao2013/redis-source-annotated,kaushik94/redis,jacklee0810/redis-3.0-annotated,SummonY/redis,zhiliaoniu/redis,GrimDerp/redis,ramonsnir/redis,ytjiang/redis,modulexcite/redis,xuzhezhaozhao/redis_reading,tzq668766/redis-3.0-annotated,MasahikoSawada/redis,hhli/redis,thomasdarimont/redis,riyan8250/redis,a-pavlov/redis,spearhead-ea/redis,aim-for-better/redis,riyan8250/redis,AplayER/redis,moonbingbing/redis-3.0-annotated,wprice/redis,WorkingOfTimtohyZhang/redis-3.0-annotated,dreamquster/redis,ctripcorp/redis,HunanTV/redis,hornen/redis,darksideofthemoo/redis-histogram,MSOpenTech/redis,soveran/redis,splitice/redis,haima-zju/redis-3.0-annotated,riyan8250/redis,cnbin/redis,july2993/redis,duanx/redis,pmem/redis,YuraLukashik/redis,supasate/redis,AALEKH/redis,ouyangkongtong/redis,whille/redis-3.0-annotated,ReadCode/redis-3.0-annotated,PKRoma/redis,healerkx/redis,francischan714/redis,atreeyang/redis,charsyam/redis,xujunhai1991/redis,yuhc/redis-benchmark-enhanced,Markgorden/redis,mattsta/redis,davidradunz/redis,xlzhan/redis,programmecat/redis,hhli/redis,ctripcorp/redis,thomasdarimont/redis,shshlzh/redis-3.0-annotated,JoeWoo/redis,Hailei/redis,aim-for-better/redis,onlymellb/redis-3.0-annotated,splitice/redis,ituncle/redis,aim-for-better/redis,weizijun/redis,clamoriniere1A/redis,YongMan/redis,huangz1990/annotated_redis_source,yossigo/redis,cusspvz/redis,harrisonfeng/redis,GrimDerp/redis,janekmi/redis,alenslan/redis,spinlock/redis,guker/redis,gechong/redis-3.0-annotated,izhoujie/redis,gongice/redis-3.0-annotated,jingjidejuren/redis,xlzhan/redis,seandsky/redis,tellapart/redis,drinkthere/redis-3.0-annotated,honestme/redis,wujf/redis,itugs/redis,soloestoy/redis,ChaosCoo/annotated_redis_source,saisai/redis,GitHubMota/redis,pmem/redis,ncopa/redis,arijitvt/redis,holstvoogd/redis,dreamquster/redis,NBSW/redis,fengshao0907/annotated_redis_source,ksarch-saas/redis,pedigree/redis,Wangyao14cyy/redis,guker/redis,pcarrier/redis,AplayER/redis,seandsky/redis,ChanningDuan/annotated_redis_source,gilala/hbjredis,fengshao0907/redis-3.0-annotated,arijitvt/redis,jasonkying/redis,ton31337/redis,MasahikoSawada/redis,gilala/bjredis,figoxu/annotated_redis_source,figoxu/annotated_redis_source,ErikDubbelboer/redis,jermnelson/redis,HouKangkang/redis-3.0-annotated,xuguruogu/redis,antirez/redis,rouzier/redis,pkdevbox/redis,rrsean/redis-3.0-annotated,supasate/redis,Aliceljm1/redis-3.0-annotated,miaoyc1989/redis-3.0-annotated,shining-yang/redis,devaos/redis,adamweixuan/redis-3.0-annotated,StevenTsai/redis,spinlock/redis,blackmady/redis,supasate/redis,weizijun/redis,ttuna/msot-redis,splitice/redis,mingyaaaa/redis,colstrom/redis,cusspvz/redis,healerkx/redis,wuxiaowei907/annotated_redis_source,shshlzh/redis-3.0-annotated,dramenk/annotated_redis_source,soloestoy/redis,duanx/redis,brg-liuwei/redis,zhoudayang/redis,hawkchch/redis,slfs007/mk-redis,tellapart/redis,cloudrain21/redis,fengshao0907/redis,mingyaaaa/redis,ReadCode/redis-3.0-annotated,ChanningDuan/annotated_redis_source,0x20h/redis