[openssl/openssl] d808fa: return immediately if namemap is NULL

[Vladimir Kotal]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/openssl
  Commit: d808fa015132d63f06f555649bc4b3f0e2e5124e
      https://github.com/openssl/openssl/commit/d808fa015132d63f06f555649bc4b3f0e2e5124e
  Author: Vladimír Kotal <vladimir.kotal at oracle.com>
  Date:   2023-06-18 (Sun, 18 Jun 2023)

  Changed paths:
    M crypto/core_namemap.c

  Log Message:
  -----------
  return immediately if namemap is NULL

Reviewed-by: Dmitry Belyavskiy <beldmit at gmail.com>
Reviewed-by: Matt Caswell <matt at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/21223)