Check file value length
Check file value length

Thank oss-fuzz
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=46002

dengert/OpenSC,philipWendland/OpenSC,OpenSC/OpenSC,LudovicRousseau/OpenSC,fabled/OpenSC,LudovicRousseau/OpenSC,fabled/OpenSC,OpenSC/OpenSC,metsma/OpenSC,fabled/OpenSC,LudovicRousseau/OpenSC,dengert/OpenSC,metsma/OpenSC,fabled/OpenSC,mouse07410/OpenSC,OpenSC/OpenSC,philipWendland/OpenSC,mouse07410/OpenSC,philipWendland/OpenSC,mouse07410/OpenSC,dengert/OpenSC,metsma/OpenSC