ctx: Avoid potential memory leaks reported by clang
ctx: Avoid potential memory leaks reported by clang

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