Fix bug that reads invalid data
Fix bug that reads invalid data

- benign bug, but cause address sanitizer to be unhappy

tanneroakes/ZipUtilities,tanneroakes/ZipUtilities,NSProgrammer/ZipUtilities,NSProgrammer/ZipUtilities,tanneroakes/ZipUtilities,NSProgrammer/ZipUtilities,tanneroakes/ZipUtilities,NSProgrammer/ZipUtilities