[openssl/openssl] b9b8e9: OBJ_nid2obj(): Return UNDEF object instead of NULL...

[Tomáš Mráz]

  Branch: refs/heads/openssl-3.1
  Home:   https://github.com/openssl/openssl
  Commit: b9b8e9ee9dd2a3eb2876ec45605c64f343d5548e
      https://github.com/openssl/openssl/commit/b9b8e9ee9dd2a3eb2876ec45605c64f343d5548e
  Author: Tomas Mraz <tomas at openssl.org>
  Date:   2023-03-23 (Thu, 23 Mar 2023)

  Changed paths:
    M crypto/objects/obj_dat.c
    M test/asn1_internal_test.c

  Log Message:
  -----------
  OBJ_nid2obj(): Return UNDEF object instead of NULL for NID_undef

Fixes a regression from 3.0 from the obj creation refactoring.

Fixes #20555

Reviewed-by: Richard Levitte <levitte at openssl.org>
Reviewed-by: Matt Caswell <matt at openssl.org>
Reviewed-by: Paul Dale <pauli at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20556)

(cherry picked from commit 908ba3ed9adbb3df90f7684a3111ca916a45202d)