[openssl/openssl] cb0ead: Incorrect null pointer check

[afshinpir]

  Branch: refs/heads/openssl-3.1
  Home:   https://github.com/openssl/openssl
  Commit: cb0ead0e1676361b8e95adc69fc305c36d49cd2b
      https://github.com/openssl/openssl/commit/cb0ead0e1676361b8e95adc69fc305c36d49cd2b
  Author: afshinpir <afshinpir at users.noreply.github.com>
  Date:   2023-03-31 (Fri, 31 Mar 2023)

  Changed paths:
    M crypto/evp/keymgmt_meth.c

  Log Message:
  -----------
  Incorrect null pointer check

CLA: trivial
There is an incorrect null pointer check and this ccommit resolves it.

Reviewed-by: Shane Lontis <shane.lontis at oracle.com>
Reviewed-by: Paul Dale <pauli at openssl.org>
Reviewed-by: Todd Short <todd.short at me.com>
(Merged from https://github.com/openssl/openssl/pull/20646)

(cherry picked from commit 6469043bbabc9728aed61d7708c32e2ae319be1d)