sdssplitargs(): now returns NULL only on error.
sdssplitargs(): now returns NULL only on error.

An empty input string also resulted into the function returning NULL
making it harder for the caller to distinguish between error and empty
string without checking the original input string length.

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