Fix coverity CID #1458644 - Negative return passed to function taking size_t in ecdh_cms_set_shared_info()
Fix coverity CID #1458644 - Negative return passed to function taking size_t in ecdh_cms_set_shared_info()

Reviewed-by: Tomas Mraz <973cc78d8b4cb00714230ba9be0225e917ab4ac6@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/12628)

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