Fix detection of 512 bit signtures (Fixes #2421)
Fix detection of 512 bit signtures (Fixes #2421)

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