Fix wait() crashing if no values are sent
Fix wait() crashing if no values are sent

JackLian/ReactiveCocoa,jrmiddle/ReactiveCocoa,cstars135/ReactiveCocoa,libiao88/ReactiveCocoa,tonyli508/ReactiveCocoa,AndyZhaoHe/ReactiveCocoa,natestedman/ReactiveCocoa,richeterre/ReactiveCocoa,huiping192/ReactiveCocoa,monkeydbobo/ReactiveCocoa,200895045/ReactiveCocoa,zhukaixy/ReactiveCocoa,RuiAAPeres/ReactiveCocoa,zhenlove/ReactiveCocoa,yizzuide/ReactiveCocoa,taylormoonxu/ReactiveCocoa,xulibao/ReactiveCocoa,terry408911/ReactiveCocoa,andersio/ReactiveCocoa,chieryw/ReactiveCocoa,zhukaixy/ReactiveCocoa,ikesyo/ReactiveCocoa,stupidfive/ReactiveCocoa,kevin-zqw/ReactiveCocoa,beni55/ReactiveCocoa,kiurentu/ReactiveCocoa,ztchena/ReactiveCocoa,CCOOOOLL/ReactiveCocoa,lixar/ReactiveCocoa,terry408911/ReactiveCocoa,DreamHill/ReactiveCocoa,yaoxiaoyong/ReactiveCocoa,sdhzwm/ReactiveCocoa,Ricowere/ReactiveCocoa,add715/ReactiveCocoa,on99/ReactiveCocoa,GuitarPlayer-Ma/ReactiveCocoa,Ethan89/ReactiveCocoa,ShawnLeee/ReactiveCocoa,fanghao085/ReactiveCocoa,200895045/ReactiveCocoa,zzqiltw/ReactiveCocoa,sandyway/ReactiveCocoa,tzongw/ReactiveCocoa,ericzhou2008/ReactiveCocoa,qq644531343/ReactiveCocoa,dskatz22/ReactiveCocoa,yangyangluoluo/ReactiveCocoa,sandyway/ReactiveCocoa,itschaitanya/ReactiveCocoa,stevielu/ReactiveCocoa,DongDongDongDong/ReactiveCocoa,j364960953/ReactiveCocoa,eyu1988/ReactiveCocoa,leelili/ReactiveCocoa,cstars135/ReactiveCocoa,jrmiddle/ReactiveCocoa,shaohung001/ReactiveCocoa,xiaobing2007/ReactiveCocoa,wpstarnice/ReactiveCocoa,mxxiv/ReactiveCocoa,buildo/ReactiveCocoa,esttorhe/ReactiveCocoa,qq644531343/ReactiveCocoa,ddc391565320/ReactiveCocoa,mxxiv/ReactiveCocoa,JackLian/ReactiveCocoa,zzqiltw/ReactiveCocoa,eyu1988/ReactiveCocoa,SuPair/ReactiveCocoa,almassapargali/ReactiveCocoa,beni55/ReactiveCocoa,jam891/ReactiveCocoa,ohwutup/ReactiveCocoa,add715/ReactiveCocoa,Khan/ReactiveCocoa,WEIBP/ReactiveCocoa,howandhao/ReactiveCocoa,hoanganh6491/ReactiveCocoa,Pingco/ReactiveCocoa,kiurentu/ReactiveCocoa,zhukaixy/ReactiveCocoa,yoichitgy/ReactiveCocoa,bensonday/ReactiveCocoa,shuxiashusheng/ReactiveCocoa,SanChain/ReactiveCocoa,cogddo/ReactiveCocoa,AndyZhaoHe/ReactiveCocoa,Khan/ReactiveCocoa,terry408911/ReactiveCocoa,hoanganh6491/ReactiveCocoa,paulyoung/ReactiveCocoa,leichunfeng/ReactiveCocoa,OneSmallTree/ReactiveCocoa,stupidfive/ReactiveCocoa,fhchina/ReactiveCocoa,clg0118/ReactiveCocoa,Juraldinio/ReactiveCocoa,nickcheng/ReactiveCocoa,sujeking/ReactiveCocoa,wpstarnice/ReactiveCocoa,tonyarnold/ReactiveCocoa,hj3938/ReactiveCocoa,itschaitanya/ReactiveCocoa,walkingsmarts/ReactiveCocoa,Farteen/ReactiveCocoa,mattpetters/ReactiveCocoa,tiger8888/ReactiveCocoa,DongDongDongDong/ReactiveCocoa,Liquidsoul/ReactiveCocoa,leichunfeng/ReactiveCocoa,on99/ReactiveCocoa,GuitarPlayer-Ma/ReactiveCocoa,yizzuide/ReactiveCocoa,zhigang1992/ReactiveCocoa,kaylio/ReactiveCocoa,jaylib/ReactiveCocoa,DongDongDongDong/ReactiveCocoa,smilypeda/ReactiveCocoa,KJin99/ReactiveCocoa,taylormoonxu/ReactiveCocoa,fanghao085/ReactiveCocoa,pzw224/ReactiveCocoa,AlanJN/ReactiveCocoa,hbucius/ReactiveCocoa,FelixYin66/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,loupman/ReactiveCocoa,Ray0218/ReactiveCocoa,towik/ReactiveCocoa,sdhzwm/ReactiveCocoa,RuiAAPeres/ReactiveCocoa,juliangrosshauser/ReactiveCocoa,yoichitgy/ReactiveCocoa,jaylib/ReactiveCocoa,shaohung001/ReactiveCocoa,SuPair/ReactiveCocoa,JohnJin007/ReactiveCocoa,xiaobing2007/ReactiveCocoa,zhaoguohui/ReactiveCocoa,JohnJin007/ReactiveCocoa,bensonday/ReactiveCocoa,chieryw/ReactiveCocoa,wangqi211/ReactiveCocoa,KuPai32G/ReactiveCocoa,KJin99/ReactiveCocoa,towik/ReactiveCocoa,ioshger0125/ReactiveCocoa,Liquidsoul/ReactiveCocoa,zhiwen1024/ReactiveCocoa,BrooksWon/ReactiveCocoa,zzzworm/ReactiveCocoa,sujeking/ReactiveCocoa,longv2go/ReactiveCocoa,imkerberos/ReactiveCocoa,zxq3220122/ReactiveCocoa,dachaoisme/ReactiveCocoa,zhaoguohui/ReactiveCocoa,fhchina/ReactiveCocoa,Ricowere/ReactiveCocoa,KuPai32G/ReactiveCocoa,dachaoisme/ReactiveCocoa,OnTheWay1988/ReactiveCocoa,xumaolin/ReactiveCocoa,takeshineshiro/ReactiveCocoa,jaylib/ReactiveCocoa,rpowelll/ReactiveCocoa,juliangrosshauser/ReactiveCocoa,libiao88/ReactiveCocoa,SanChain/ReactiveCocoa,stevielu/ReactiveCocoa,mxxiv/ReactiveCocoa,tornade0913/ReactiveCocoa,xumaolin/ReactiveCocoa,Khan/ReactiveCocoa,yangshengchaoios/ReactiveCocoa,chao95957/ReactiveCocoa,yytong/ReactiveCocoa,cogddo/ReactiveCocoa,jeelun/ReactiveCocoa,bscarano/ReactiveCocoa,PSPDFKit-labs/ReactiveCocoa,jsslai/ReactiveCocoa,jrmiddle/ReactiveCocoa,zzqiltw/ReactiveCocoa,hbucius/ReactiveCocoa,richeterre/ReactiveCocoa,tzongw/ReactiveCocoa,dskatz22/ReactiveCocoa,CQXfly/ReactiveCocoa,imkerberos/ReactiveCocoa,almassapargali/ReactiveCocoa,loupman/ReactiveCocoa,mattpetters/ReactiveCocoa,lixar/ReactiveCocoa,qq644531343/ReactiveCocoa,KJin99/ReactiveCocoa,hilllinux/ReactiveCocoa,natestedman/ReactiveCocoa,gengjf/ReactiveCocoa,zzzworm/ReactiveCocoa,ShawnLeee/ReactiveCocoa,icepy/ReactiveCocoa,dz1111/ReactiveCocoa,stevielu/ReactiveCocoa,windgo/ReactiveCocoa,hj3938/ReactiveCocoa,natan/ReactiveCocoa,nikita-leonov/ReactiveCocoa,gengjf/ReactiveCocoa,cogddo/ReactiveCocoa,dskatz22/ReactiveCocoa,monkeydbobo/ReactiveCocoa,OnTheWay1988/ReactiveCocoa,zhenlove/ReactiveCocoa,200895045/ReactiveCocoa,xiaoliyang/ReactiveCocoa,alvinvarghese/ReactiveCocoa,BrooksWon/ReactiveCocoa,clg0118/ReactiveCocoa,ikesyo/ReactiveCocoa,andersio/ReactiveCocoa,yaoxiaoyong/ReactiveCocoa,hilllinux/ReactiveCocoa,vincentiss/ReactiveCocoa,zhaoguohui/ReactiveCocoa,walkingsmarts/ReactiveCocoa,nikita-leonov/ReactiveCocoa,yangyangluoluo/ReactiveCocoa,CQXfly/ReactiveCocoa,FelixYin66/ReactiveCocoa,windgo/ReactiveCocoa,alvinvarghese/ReactiveCocoa,sandyway/ReactiveCocoa,msdgwzhy6/ReactiveCocoa,leelili/ReactiveCocoa,msdgwzhy6/ReactiveCocoa,huiping192/ReactiveCocoa,ericzhou2008/ReactiveCocoa,ohwutup/ReactiveCocoa,AndyZhaoHe/ReactiveCocoa,valleyman86/ReactiveCocoa,jsslai/ReactiveCocoa,PSPDFKit-labs/ReactiveCocoa,rpowelll/ReactiveCocoa,zhigang1992/ReactiveCocoa,jaylib/ReactiveCocoa,stupidfive/ReactiveCocoa,jam891/ReactiveCocoa,cnbin/ReactiveCocoa,ioshger0125/ReactiveCocoa,zhigang1992/ReactiveCocoa,howandhao/ReactiveCocoa,ceekayel/ReactiveCocoa,FelixYin66/ReactiveCocoa,vincentiss/ReactiveCocoa,BrooksWon/ReactiveCocoa,imkerberos/ReactiveCocoa,almassapargali/ReactiveCocoa,loupman/ReactiveCocoa,jackywpy/ReactiveCocoa,pzw224/ReactiveCocoa,wpstarnice/ReactiveCocoa,takeshineshiro/ReactiveCocoa,BlessNeo/ReactiveCocoa,ceekayel/ReactiveCocoa,beni55/ReactiveCocoa,AlanJN/ReactiveCocoa,PSPDFKit-labs/ReactiveCocoa,calebd/ReactiveCocoa,hoanganh6491/ReactiveCocoa,leelili/ReactiveCocoa,CQXfly/ReactiveCocoa,wangqi211/ReactiveCocoa,BlessNeo/ReactiveCocoa,Pingco/ReactiveCocoa,mtxs007/ReactiveCocoa,esttorhe/ReactiveCocoa,ohwutup/ReactiveCocoa,Eveian/ReactiveCocoa,CCOOOOLL/ReactiveCocoa,libiao88/ReactiveCocoa,shuxiashusheng/ReactiveCocoa,jackywpy/ReactiveCocoa,natan/ReactiveCocoa,dullgrass/ReactiveCocoa,goodheart/ReactiveCocoa,paulyoung/ReactiveCocoa,shuxiashusheng/ReactiveCocoa,xulibao/ReactiveCocoa,ShawnLeee/ReactiveCocoa,BlessNeo/ReactiveCocoa,zhiwen1024/ReactiveCocoa,kaylio/ReactiveCocoa,tonyli508/ReactiveCocoa,brasbug/ReactiveCocoa,calebd/ReactiveCocoa,tornade0913/ReactiveCocoa,liufeigit/ReactiveCocoa,bscarano/ReactiveCocoa,monkeydbobo/ReactiveCocoa,xumaolin/ReactiveCocoa,jam891/ReactiveCocoa,xiaoliyang/ReactiveCocoa,Ray0218/ReactiveCocoa,vincentiss/ReactiveCocoa,yaoxiaoyong/ReactiveCocoa,longv2go/ReactiveCocoa,cnbin/ReactiveCocoa,dz1111/ReactiveCocoa,sujeking/ReactiveCocoa,DreamHill/ReactiveCocoa,valleyman86/ReactiveCocoa,howandhao/ReactiveCocoa,LHDsimon/ReactiveCocoa,nickcheng/ReactiveCocoa,OneSmallTree/ReactiveCocoa,ztchena/ReactiveCocoa,msdgwzhy6/ReactiveCocoa,CCOOOOLL/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,esttorhe/ReactiveCocoa,itschaitanya/ReactiveCocoa,tonyarnold/ReactiveCocoa,JackLian/ReactiveCocoa,towik/ReactiveCocoa,victorlin/ReactiveCocoa,dullgrass/ReactiveCocoa,Pingco/ReactiveCocoa,ioshger0125/ReactiveCocoa,Farteen/ReactiveCocoa,alvinvarghese/ReactiveCocoa,icepy/ReactiveCocoa,Rupert-RR/ReactiveCocoa,tzongw/ReactiveCocoa,nickcheng/ReactiveCocoa,yytong/ReactiveCocoa,tonyarnold/ReactiveCocoa,jeelun/ReactiveCocoa,taylormoonxu/ReactiveCocoa,liufeigit/ReactiveCocoa,zzzworm/ReactiveCocoa,cstars135/ReactiveCocoa,isghe/ReactiveCocoa,kiurentu/ReactiveCocoa,tiger8888/ReactiveCocoa,dachaoisme/ReactiveCocoa,Liquidsoul/ReactiveCocoa,nickcheng/ReactiveCocoa,valleyman86/ReactiveCocoa,wangqi211/ReactiveCocoa,xiaoliyang/ReactiveCocoa,richeterre/ReactiveCocoa,liufeigit/ReactiveCocoa,bscarano/ReactiveCocoa,walkingsmarts/ReactiveCocoa,mtxs007/ReactiveCocoa,llb1119/test,ericzhou2008/ReactiveCocoa,sugar2010/ReactiveCocoa,yangshengchaoios/ReactiveCocoa,add715/ReactiveCocoa,andersio/ReactiveCocoa,Eveian/ReactiveCocoa,dullgrass/ReactiveCocoa,jackywpy/ReactiveCocoa,natan/ReactiveCocoa,zxq3220122/ReactiveCocoa,windgo/ReactiveCocoa,llb1119/test,kevin-zqw/ReactiveCocoa,shaohung001/ReactiveCocoa,yytong/ReactiveCocoa,j364960953/ReactiveCocoa,goodheart/ReactiveCocoa,chieryw/ReactiveCocoa,SanChain/ReactiveCocoa,huiping192/ReactiveCocoa,luerhouhou/ReactiveCocoa,Ricowere/ReactiveCocoa,sugar2010/ReactiveCocoa,takeshineshiro/ReactiveCocoa,JohnJin007/ReactiveCocoa,esttorhe/ReactiveCocoa,brasbug/ReactiveCocoa,RuiAAPeres/ReactiveCocoa,tonyli508/ReactiveCocoa,sdhzwm/ReactiveCocoa,buildo/ReactiveCocoa,smilypeda/ReactiveCocoa,emodeqidao/ReactiveCocoa,SuPair/ReactiveCocoa,lixar/ReactiveCocoa,rpowelll/ReactiveCocoa,victorlin/ReactiveCocoa,isghe/ReactiveCocoa,ztchena/ReactiveCocoa,Rupert-RR/ReactiveCocoa,LHDsimon/ReactiveCocoa,WEIBP/ReactiveCocoa,llb1119/test,pzw224/ReactiveCocoa,Farteen/ReactiveCocoa,yoichitgy/ReactiveCocoa,hj3938/ReactiveCocoa,natestedman/ReactiveCocoa,chao95957/ReactiveCocoa,bensonday/ReactiveCocoa,yonekawa/ReactiveCocoa,clg0118/ReactiveCocoa,mattpetters/ReactiveCocoa,emodeqidao/ReactiveCocoa,nikita-leonov/ReactiveCocoa,emodeqidao/ReactiveCocoa,mtxs007/ReactiveCocoa,fanghao085/ReactiveCocoa,calebd/ReactiveCocoa,smilypeda/ReactiveCocoa,victorlin/ReactiveCocoa,xulibao/ReactiveCocoa,tornade0913/ReactiveCocoa,hbucius/ReactiveCocoa,huiping192/R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