Added missing non-null test for NSError pointer
Added missing non-null test for NSError pointer

ppierson/RestKit,money-alex2006hw/RestKit,dx285/RestKit,moneytree/RestKit,moritzh/RestKit,PonderProducts/RestKit,nalindz/pulpfiction-RestKit,pbogdanv/RestKit,timbodeit/RestKit,qingsong-xu/RestKit,zaichang/RestKit,RyanCodes/RestKit,percysnoodle/RestKit,caamorales/RestKit,djz-code/RestKit,ppierson/RestKit,CenterDevice/RestKit,Bogon/RestKit,ppierson/RestKit,goldstar/RestKit,qingsong-xu/RestKit,justinyaoqi/RestKit,agworld/RestKit,mumer92/RestKit,lmirosevic/RestKit,money-alex2006hw/RestKit,antondarki/RestKit,mikarun/RestKit,cnbin/RestKit,oligriffiths/RestKit,TheFarm/RestKit,djz-code/RestKit,mavericksunny/RestKit,taptaptap/RestKit,canaydogan/RestKit,HYPERHYPER/RestKit2,sandyway/RestKit,DocuSignDev/RestKit,gank0326/restkit,sachin-khard/NucleusRestKit,LiuShulong/RestKit,Livestream/RestKit,Gaantz/RestKit,ForrestAlfred/RestKit,agworld/RestKit,mavericksunny/RestKit,RyanCodes/RestKit,naqi/RestKit,LiuShulong/RestKit,RestKit/RestKit,wuxsoft/RestKit,nphkh/RestKit,SuPair/RestKit,canaydogan/RestKit,samkrishna/RestKit,imton/RestKit,apontador/RestKit,wangjiangwen/RestKit,thomaschristensen/RestKit,paperlesspost/RestKit,caamorales/RestKit,naqi/RestKit,dx285/RestKit,sachin-khard/NucRestKit,kevmeyer/RestKit,Juraldinio/RestKit,QLGu/RestKit,caamorales/RestKit,hejunbinlan/RestKit,adozenlines/RestKit,common2015/RestKit,cnbin/RestKit,canaydogan/RestKit,moneytree/RestKit,aleufms/RestKit,sachin-khard/NucRestKit,samanalysis/RestKit,moritzh/RestKit,common2015/RestKit,dx285/RestKit,erichedstrom/RestKit,HarrisLee/RestKit,Gaantz/RestKit,pat2man/RestKit,wangjiangwen/RestKit,wangjiangwen/RestKit,vilinskiy-playdayteam/RestKit,StasanTelnov/RestKit,coderChrisLee/RestKit,forcedotcom/RestKit,Meihualu/RestKit,StasanTelnov/RestKit,mumer92/RestKit,zilaiyedaren/RestKit,HarrisLee/RestKit,SuPair/RestKit,Papercloud/RestKit,CenterDevice/RestKit,gauravstomar/RestKit,youssman/RestKit,CodewareTechnology/RestKit,hejunbinlan/RestKit,0x73/RestKit,oye-lionel/GithubTest,samkrishna/RestKit,braindata/RestKit-1,sachin-khard/NucRestKit,braindata/RestKit-1,timbodeit/RestKit,zilaiyedaren/RestKit,djz-code/RestKit,gauravstomar/RestKit,fedegasp/RestKit,Meihualu/RestKit,Gaantz/RestKit,0dayZh/RestKit,baumatron/RestKit,Meihualu/RestKit,StasanTelnov/RestKit,Livestream/RestKit,gumdal/RestKit,HYPERHYPER/RestKit2,jonesgithub/RestKit,LiuShulong/RestKit,hanangellove/RestKit,wireitcollege/RestKit,lucasecf/RestKit,erichedstrom/RestKit,hanangellove/RestKit,hejunbinlan/RestKit,Papercloud/RestKit,gauravstomar/RestKit,sachin-khard/NucleusRestKit,0dayZh/RestKit,zaichang/RestKit,cryptojuice/RestKit,loverbabyz/RestKit,hanangellove/RestKit,money-alex2006hw/RestKit,ChinaPicture/RestKit,kevmeyer/RestKit,CenterDevice/RestKit,gank0326/restkit,wangjiangwen/RestKit,lmirosevic/RestKit,thomaschristensen/RestKit,jrtaal/RestKit,RestKit/RestKit,margarina/RestKit-latest,mberube09/RestKit,zjh171/RestKit,qingsong-xu/RestKit,ForrestAlfred/RestKit,loverbabyz/RestKit,loverbabyz/RestKit,dx285/RestKit,Bogon/RestKit,TheFarm/RestKit,Juraldinio/RestKit,wireitcollege/RestKit,lmirosevic/RestKit,braindata/RestKit,orta/RestKit,mavericksunny/RestKit,coderChrisLee/RestKit,zjh171/RestKit,Flutterbee/RestKit,damiannz/RestKit,HYPERHYPER/RestKit2,zaichang/RestKit,hanangellove/RestKit,DocuSignDev/RestKit,fhchina/RestKit,fedegasp/RestKit,vilinskiy-playdayteam/RestKit,ForrestAlfred/RestKit,concreteinteractive/RestKit,coderChrisLee/RestKit,justinyaoqi/RestKit,ForrestAlfred/RestKit,Meihualu/RestKit,Papercloud/RestKit,sachin-khard/NucRestKit,gumdal/RestKit,TwinEngineLabs-Engineering/RestKit-TEL,Livestream/RestKit,erichedstrom/RestKit,oye-lionel/GithubTest,REXLabsInc/RestKit,gank0326/restkit,cryptojuice/RestKit,Juraldinio/RestKit,oligriffiths/RestKit,wuxsoft/RestKit,ipmobiletech/RestKit,oligriffiths/RestKit,damiannz/RestKit,loverbabyz/RestKit,qingsong-xu/RestKit,TwinEngineLabs-Engineering/RestKit-TEL,Gaantz/RestKit,SuPair/RestKit,braindata/RestKit-1,TwinEngineLabs-Engineering/RestKit-TEL,oye-lionel/GithubTest,sandyway/RestKit,youssman/RestKit,QLGu/RestKit,ppierson/RestKit,oye-lionel/GithubTest,ChinaPicture/RestKit,hejunbinlan/RestKit,youssman/RestKit,QLGu/RestKit,wuxsoft/RestKit,REXLabsInc/RestKit,nphkh/RestKit,apontador/RestKit,mumer92/RestKit,0x73/RestKit,CodewareTechnology/RestKit,zilaiyedaren/RestKit,ChinaPicture/RestKit,zhenlove/RestKit,RyanCodes/RestKit,cnbin/RestKit,DejaMi/RestKit,concreteinteractive/RestKit,moritzh/RestKit,aleufms/RestKit,jonesgithub/RestKit,cryptojuice/RestKit,mcfedr/RestKit,fhchina/RestKit,braindata/RestKit,caamorales/RestKit,antondarki/RestKit,braindata/RestKit,Papercloud/RestKit,zilaiyedaren/RestKit,pat2man/RestKit,zaichang/RestKit,zilaiyedaren/RestKit,paperlesspost/RestKit,fhchina/RestKit,zhenlove/RestKit,fhchina/RestKit,lmirosevic/RestKit,nalindz/pulpfiction-RestKit,pat2man/RestKit,HYPERHYPER/RestKit2,nett55/RestKit,hejunbinlan/RestKit,zhenlove/RestKit,lucasecf/RestKit,cfis/RestKit,antondarki/RestKit,cfis/RestKit,Bogon/RestKit,pbogdanv/RestKit,HYPERHYPER/RestKit2,zhenlove/RestKit,moritzh/RestKit,pbogdanv/RestKit,wyzzarz/RestKit,oligriffiths/RestKit,pat2man/RestKit,agworld/RestKit,aleufms/RestKit,jonesgithub/RestKit,cfis/RestKit,qingsong-xu/RestKit,taptaptap/RestKit,RyanCodes/RestKit,HarrisLee/RestKit,0dayZh/RestKit,ForrestAlfred/RestKit,wyzzarz/RestKit,wuxsoft/RestKit,mcfedr/RestKit,wyzzarz/RestKit,Flutterbee/RestKit,percysnoodle/RestKit,PonderProducts/RestKit,justinyaoqi/RestKit,aleufms/RestKit,SuPair/RestKit,SuPair/RestKit,nalindz/pulpfiction-RestKit,pbogdanv/RestKit,forcedotcom/RestKit,percysnoodle/RestKit,jonesgithub/RestKit,timbodeit/RestKit,wangjiangwen/RestKit,RestKit/RestKit,Juraldinio/RestKit,Meihualu/RestKit,nett55/RestKit,gumdal/RestKit,PonderProducts/RestKit,mikarun/RestKit,canaydogan/RestKit,QLGu/RestKit,sachin-khard/NucleusRestKit,thomaschristensen/RestKit,zhenlove/RestKit,caamorales/RestKit,DejaMi/RestKit,imton/RestKit,dx285/RestKit,moneytree/RestKit,samanalysis/RestKit,oligriffiths/RestKit,percysnoodle/RestKit,lucasecf/RestKit,forcedotcom/RestKit,Gaantz/RestKit,aleufms/RestKit,nett55/RestKit,samanalysis/RestKit,DejaMi/RestKit,nett55/RestKit,vilinskiy-playdayteam/RestKit,concreteinteractive/RestKit,hanangellove/RestKit,damiannz/RestKit,adozenlines/RestKit,baumatron/RestKit,ChinaPicture/RestKit,damiannz/RestKit,apontador/RestKit,Juraldinio/RestKit,Papercloud/RestKit,TwinEngineLabs-Engineering/RestKit-TEL,orta/RestKit,RyanCodes/RestKit,ipmobiletech/RestKit,imton/RestKit,common2015/RestKit,0x73/RestKit,LiuShulong/RestKit,zjh171/RestKit,taptaptap/RestKit,justinyaoqi/RestKit,fedegasp/RestKit,moritzh/RestKit,fedegasp/RestKit,nphkh/RestKit,timbodeit/RestKit,youssman/RestKit,gauravstomar/RestKit,ipmobiletech/RestKit,CodewareTechnology/RestKit,samanalysis/RestKit,sandyway/RestKit,braindata/RestKit-1,braindata/RestKit,fhchina/RestKit,kevmeyer/RestKit,QLGu/RestKit,braindata/RestKit-1,mberube09/RestKit,pbogdanv/RestKit,TheFarm/RestKit,HarrisLee/RestKit,LiuShulong/RestKit,gauravstomar/RestKit,TwinEngineLabs-Engineering/RestKit-TEL,margarina/RestKit-latest,jonesgithub/RestKit,sandyway/RestKit,PonderProducts/RestKit,DocuSignDev/RestKit,mberube09/RestKit,ppierson/RestKit,apontador/RestKit,cnbin/RestKit,lmirosevic/RestKit,antondarki/RestKit,sandyway/RestKit,paperlesspost/RestKit,canaydogan/RestKit,ChinaPicture/RestKit,wireitcollege/RestKit,concreteinteractive/RestKit,adozenlines/RestKit,REXLabsInc/RestKit,ipmobiletech/RestKit,nphkh/RestKit,mumer92/RestKit,paperlesspost/RestKit,nphkh/RestKit,jrtaal/RestKit,wyzzarz/RestKit,Livestream/RestKit,DejaMi/RestKit,taptaptap/RestKit,samkrishna/RestKit,Flutterbee/RestKit,0x73/RestKit,baumatron/RestKit,djz-code/RestKit,wireitcollege/RestKit,pat2man/RestKit,HarrisLee/RestKit,coderChrisLee/RestKit,goldstar/RestKit,REXLabsInc/RestKit,CodewareTechnology/RestKit,sachin-khard/NucleusRestKit,vilinskiy-playdayteam/RestKit,common2015/RestKit,mberube09/RestKit,timbodeit/RestKit,nett55/RestKit,cnbin/RestKit,kevmeyer/RestKit,fedegasp/RestKit,0x73/RestKit,thomaschristensen/RestKit,margarina/RestKit-latest,concreteinteractive/RestKit,nalindz/pulpfiction-RestKit,agworld/RestKit,ipmobiletech/RestKit,damiannz/RestKit,jrtaal/RestKit,mikarun/RestKit,mikarun/RestKit,apontador/RestKit,0dayZh/RestKit,coderChrisLee/RestKit,wuxsoft/RestKit,youssman/RestKit,naqi/RestKit,moneytree/RestKit,justinyaoqi/RestKit,Bogon/RestKit,zjh171/RestKit,samanalysis/RestKit,loverbabyz/RestKit,goldstar/RestKit,zjh171/RestKit,adozenlines/RestKit,common2015/RestKit,goldstar/RestKit,gank0326/restkit,margarina/RestKit-latest,money-alex2006hw/RestKit,sachin-khard/NucRestKit,mikarun/RestKit,lucasecf/RestKit,Flutterbee/RestKit,imton/RestKit,gank0326/restkit,sachin-khard/NucleusRestKit,lucasecf/RestKit,baumatron/RestKit,CodewareTechnology/RestKit,naqi/RestKit,money-alex2006hw/RestKit,jrtaal/RestKit,adozenlines/RestKit,jrtaal/RestKit,antondarki/RestKit,cryptojuice/RestKit,imton/RestKit,cryptojuice/RestKit,CenterDevice/RestKit,oye-lionel/GithubTest,moneytree/RestKit,forcedotcom/RestKit,kevmeyer/RestKit,Bogon/RestKit,mavericksunny/RestKit,mumer92/RestKit,DejaMi/RestKit,baumatron/RestKit,wireitcollege/RestKit