Fixes missing targetClass variable
Fixes missing targetClass variable

Had to throw another exception to handle `null` `target`.
artem-zinnatullin/butterknife,yigeyidian/butterknife,kevinmost/butterknife,androidgilbert/butterknife,Scanor/butterknife,yuhuayi/butterknife,ze-pequeno/butterknife,littlezan/butterknife,hzsweers/butterknife,byterom/android_external_JakeWharton_butterknife,serj-lotutovici/butterknife,Peter32/butterknife,ChinaKim/butterknife,jbc25/butterknife,ruhaly/butterknife,suzukaze/butterknife,treejames/butterknife,wuman/butterknife,dreamseekerkun/butterknife,wangkr/butterknife,byterom/android_external_JakeWharton_butterknife,wuman/butterknife,lockerfish/butterknife,Shedings/butterknife,carollynn2253/butterknife,androidgilbert/butterknife,haoyh/butterknife,JackLeeMing/butterknife,ze-pequeno/butterknife,wangkr/butterknife,YuzurihaInori/butterknife,ThirdProject/android_external_JakeWharton_butterknife,huangsongyan/butterknife,Peter32/butterknife,yushiwo/butterknife,github609195946/butterknife,NortonAhu/butterknife,KristenXu/butterknife,zheng1733/butterknife,ruhaly/butterknife,xsingHu/butterknife,sylsi/butterknife,risedrag/butterknife,github609195946/butterknife,hgl888/butterknife,kevinmost/butterknife,sylsi/butterknife,wenxueliu/butterknife,risedrag/butterknife,carollynn2253/butterknife,Scanor/butterknife,KoMinkyu/butterknife,JudeRosario/butterknife,jbc25/butterknife,hzsweers/butterknife,huanting/butterknife,littlezan/butterknife,hgl888/butterknife,kaoree/butterknife,yushiwo/butterknife,yigeyidian/butterknife,yadihaoku/butterknife,JellyBeanIdea/butterknife,b-cuts/butterknife,sunios/butterknife,JuranoSaurus/butterknife,wuseal/butterknife,suzukaze/butterknife,newtonker/butterknife,MichaelEvans/butterknife,wuseal/butterknife,lockerfish/butterknife,lukaciko/butterknife,deveshmittal/butterknife,PAC-ROM/android_external_JakeWharton_butterknife,chuangWu/butterknife,MichaelEvans/butterknife,littlezan/butterknife,oguzbabaoglu/butterfork,qingsong-xu/butterknife,rajyvan/butterknife,ze-pequeno/butterknife,xsingHu/butterknife,Orbar/butterknife,serj-lotutovici/butterknife,yuanbo1026/butterknife,ptornhult/butterknife,yuanbo1026/butterknife,healthy-tree/butterknife,nabishpaul/butterknife,healthy-tree/butterknife,PAC-ROM/android_external_JakeWharton_butterknife,ChristianBecker/butterknife,kaoree/butterknife,chuangWu/butterknife,KristenXu/butterknife,srayhunter/butterknife,b-cuts/butterknife,renatohsc/butterknife,treejames/butterknife,healthy-tree/butterknife,ruhaly/butterknife,haoyh/butterknife,JasonWKS/butterknife,appdevzhang/butterknife,JasonWKS/butterknife,wuseal/butterknife,JakeWharton/butterknife,artem-zinnatullin/butterknife,huangsongyan/butterknife,JakeWharton/butterknife,b-cuts/butterknife,oguzbabaoglu/butterfork,ChristianBecker/butterknife,sunios/butterknife,Orbar/butterknife,github609195946/butterknife,tsunli/butterknife,dreamseekerkun/butterknife,tbsandee/butterknife,krumman/butterknife,artem-zinnatullin/butterknife,pyricau/butterknife,xfumihiro/butterknife,nabishpaul/butterknife,JackLeeMing/butterknife,OneRom/external_butterknife,ChristianBecker/butterknife,yuhuayi/butterknife,NortonAhu/butterknife,zheng1733/butterknife,jvvlives2005/butterknife,nabishpaul/butterknife,androidgilbert/butterknife,yuanhuihui/butterknife,Shedings/butterknife,SOFTPOWER1991/butterknife,newtonker/butterknife,suzukaze/butterknife,ChristianBecker/butterknife,zhakui/butterknife,pyricau/butterknife,hgl888/butterknife,tanweijiu/butterknife,jam0cam/butterknife,ta893115871/butterknife,wuman/butterknife,Orbar/butterknife,luinnx/butterknife,zheng1733/butterknife,PAC-ROM/android_external_JakeWharton_butterknife,newtonker/butterknife,yuhuayi/butterknife,dance609195946/butterknife,huangsongyan/butterknife,zhakui/butterknife,tanweijiu/butterknife,rajyvan/butterknife,xfumihiro/butterknife,qingsong-xu/butterknife,ThirdProject/android_external_JakeWharton_butterknife,JudeRosario/butterknife,tsunli/butterknife,omegasoft7/butterknife,ChinaKim/butterknife,sylsi/butterknife,vamsirajendra/butterknife,wuzheng4android/butterknife,luinnx/butterknife,Peter32/butterknife,KoMinkyu/butterknife,NortonAhu/butterknife,carollynn2253/butterknife,ta893115871/butterknife,dreamseekerkun/butterknife,treejames/butterknife,appdevzhang/butterknife,yuanhuihui/butterknife,JuranoSaurus/butterknife,OneRom/external_butterknife,kaoree/butterknife,jbc25/butterknife,ta893115871/butterknife,haoyh/butterknife,JakeWharton/butterknife,renatohsc/butterknife,yigeyidian/butterknife,JackLeeMing/butterknife,wuzheng4android/butterknife,huanting/butterknife,JakeWharton/butterknife,jam0cam/butterknife,eleme/butterknife,srayhunter/butterknife,zhakui/butterknife,lukaciko/butterknife,eleme/butterknife,JudeRosario/butterknife,KoMinkyu/butterknife,yadihaoku/butterknife,yuanbo1026/butterknife,YuzurihaInori/butterknife,chuangWu/butterknife,OneRom/external_butterknife,AmberWhiteSky/butterknife,tanweijiu/butterknife,tbsandee/butterknife,wangkr/butterknife,GeekHades/butterknife,xsingHu/butterknife,hzsweers/butterknife,yushiwo/butterknife,MichaelEvans/butterknife,yadihaoku/butterknife,jvvlives2005/butterknife,renatohsc/butterknife,risedrag/butterknife,GeekHades/butterknife,vamsirajendra/butterknife,xfumihiro/butterknife,Shedings/butterknife,Scanor/butterknife,vamsirajendra/butterknife,ze-pequeno/butterknife,kevinmost/butterknife,GeekHades/butterknife,ThirdProject/android_external_JakeWharton_butterknife,wuzheng4android/butterknife,dance609195946/butterknife,lockerfish/butterknife,krumman/butterknife,srayhunter/butterknife,ChinaKim/butterknife,JuranoSaurus/butterknife,tsunli/butterknife,serj-lotutovici/butterknife,KristenXu/butterknife,omegasoft7/butterknife,oguzbabaoglu/butterfork,tbsandee/butterknife,sunios/butterknife,yuanhuihui/butterknife,wenxueliu/butterknife,AmberWhiteSky/butterknife,SOFTPOWER1991/butterknife,wenxueliu/butterknife,JasonWKS/butterknife,jvvlives2005/butterknife,jam0cam/butterknife,luinnx/butterknife,krumman/butterknife,JellyBeanIdea/butterknife,ptornhult/butterknife,JellyBeanIdea/butterknife,appdevzhang/butterknife,huanting/butterknife,qingsong-xu/butterknife,ptornhult/butterknife,YuzurihaInori/butterknife,byterom/android_external_JakeWharton_butterknife,rajyvan/butterknife,deveshmittal/butterknife,eleme/butterknife,SOFTPOWER1991/butterknife,AmberWhiteSky/butterknife,dance609195946/butterknife,lukaciko/butterknife