[openssl/openssl] 6f4da1: Fix potential NULL deref in ssl_old_test.c

[Todd Short]

  Branch: refs/heads/openssl-3.0
  Home:   https://github.com/openssl/openssl
  Commit: 6f4da170567552d3428e22b508c0674009c56cad
      https://github.com/openssl/openssl/commit/6f4da170567552d3428e22b508c0674009c56cad
  Author: Todd Short <todd.short at me.com>
  Date:   2023-10-26 (Thu, 26 Oct 2023)

  Changed paths:
    M test/ssl_old_test.c

  Log Message:
  -----------
  Fix potential NULL deref in ssl_old_test.c

Fix #22367

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Paul Dale <pauli at openssl.org>
Reviewed-by: Hugo Landau <hlandau at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22383)

(cherry picked from commit 42772df59bef7422060fbe70551c72d804bc669a)