pkcs15-lib.c: Fix more leaks
pkcs15-lib.c: Fix more leaks

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