Checking the return of BIO_new_fp(). If it returns NULL, then it is unnecessary to...

Checking the return of BIO_new_fp(). If it returns NULL, then it is unnecessary to build the BIO chain and better make the caller directly return NULL

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19445)

(cherry picked from commit fb03e6145961005a6db011d2f36660d2eed734e2)