Ported 42cfa9c from ZXing
Ported 42cfa9c from ZXing

Original commit message: "Closes Issue #37 : don't respond to (invalid?)
UPC-E codes that aren't 8 digits"

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