Free ecpoint data in case of failure
Free ecpoint data in case of failure

Thanks oss-fuzz
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=46855

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