Ported c42131e from ZXing
Ported c42131e from ZXing

Original commit message: "Issue #41 : Handle null barcode metadata in
PDF417 in corner case"

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