OSV-2020-709 Heap-double-free in sc_pkcs15_free_object_content

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=18890 Crash type: Heap-double-free Crash state: scpkcs15freeobjectcontent scpkcs15freeobject fuzzpkcs15decode.c...