profile.c: Do not overwrite existing pointer
profile.c: Do not overwrite existing pointer

Thanks OSS-Fuzz
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=49848

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