coolkey: Do not return bogus error if read already failed
coolkey: Do not return bogus error if read already failed

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