Cache values that are accessed a lot
Cache values that are accessed a lot

This helps performance somewhat because accessing the property each
time through the loop adds a fair amount of overhead given these loops
are over the entire image.

benjohnde/ZXingObjC,tejesh-alimilli/ZXingObjC,fanwenkai/ZXingObjC,xuxubin/ZXingObjC,JeremyPacker/ZXingObjC,rowliny/ZXingObjC,fuzhiqiang1989/ZXingObjC,adan016/ZXingObjC,tejesh-alimilli/ZXingObjC,zilaiyedaren/ZXingObjC,peacemoon/ZXingObjC,YotrolZ/ZXingObjC,sdhzwm/ZXingObjC,rowliny/ZXingObjC,Kalvar/ZXingObjC,zilaiyedaren/ZXingObjC,rkpant/ZXingObjC,jebai0521/ZXingObjC,cortices/ZXingObjC,elegion/ios-pods-ZXingObjC,YotrolZ/ZXingObjC,JeremyPacker/ZXingObjC,sdhzwm/ZXingObjC,wuxsoft/ZXingObjC,Stocard/ZXingObjC,cortices/ZXingObjC,trsathya/ZXingObjC,zeffon/ZXingObjC,RockyAo/ZXingObjC,jianwoo/ZXingObjC,peacemoon/ZXingObjC,ufs-slizhik/ZXingObjC,Stocard/ZXingObjC,Kevin775263419/ZXingObjC,TheLevelUp/ZXingObjC,Kevin775263419/ZXingObjC,TheLevelUp/ZXingObjC,RockyAo/ZXingObjC,xuxubin/ZXingObjC,wuxsoft/ZXingObjC,jianwoo/ZXingObjC,fuzhiqiang1989/ZXingObjC,elegion/ios-pods-ZXingObjC,ufs-slizhik/ZXingObjC,benjohnde/ZXingObjC,rkpant/ZXingObjC,fanwenkai/ZXingObjC,Kalvar/ZXingObjC,zeffon/ZXingObjC,trsathya/ZXingObjC,jebai0521/ZXingObjC,adan016/ZXingObjC