fixed compiler warning
fixed compiler warning

LudovicRousseau/OpenSC,philipWendland/OpenSC,mouse07410/OpenSC,dengert/OpenSC,AktivCo/OpenSC,Jakuje/OpenSC,fabled/OpenSC,dengert/OpenSC,fabled/OpenSC,metsma/OpenSC,Jakuje/OpenSC,Jakuje/OpenSC,frankmorgner/OpenSC,metsma/OpenSC,OpenSC/OpenSC,hongquan/OpenSC-main,frankmorgner/OpenSC,LudovicRousseau/OpenSC,dengert/OpenSC,fabled/OpenSC,OpenSC/OpenSC,philipWendland/OpenSC,mouse07410/OpenSC,OpenSC/OpenSC,mouse07410/OpenSC,Jakuje/OpenSC,fabled/OpenSC,philipWendland/OpenSC,hongquan/OpenSC-main,AktivCo/OpenSC,metsma/OpenSC,frankmorgner/OpenSC,AktivCo/OpenSC,frankmorgner/OpenSC,LudovicRousseau/OpenSC,hongquan/OpenSC-main