Fix X509_REQ_print_ex bug

Fix X509_REQ_print_ex bug

Similar to the bug fixed in 02db7354fe7 (Fix bug in X509_print_ex).
The error return value from X509_NAME_print_ex() is different
depending on whether the flags are XN_FLAG_COMPAT or not.
Apply a similar fix to what was done for X509_print_ex here as well.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Todd Short <todd.short@me.com>
(Merged from https://github.com/openssl/openssl/pull/19963)

(cherry picked from commit 2b5e028a2f70de216458a5140bcf4ec3d9236eeb)