coverity 1414446 out-of-bounds access: allocate \0 terminator byte to be safe
coverity 1414446 out-of-bounds access: allocate \0 terminator byte to be safe

Reviewed-by: Tomas Mraz <973cc78d8b4cb00714230ba9be0225e917ab4ac6@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/13091)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl