OSV-2020-430 Stack-use-after-return in OSSL_PARAM_get_int32

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15114 Crash type: Stack-use-after-return READ 4 Crash state: OSSLPARAMgetint32 md5sha1setparams ssl3finalfinishmac...