[openssl/openssl] fe8956: Fix incorrect error return value in i2r_ADMISSION_...

[Niels Dossche]

  Branch: refs/heads/openssl-3.1
  Home:   https://github.com/openssl/openssl
  Commit: fe89566149fca339e4213b172c9928a5bf837506
      https://github.com/openssl/openssl/commit/fe89566149fca339e4213b172c9928a5bf837506
  Author: Niels Dossche <niels.dossche at ugent.be>
  Date:   2023-01-19 (Thu, 19 Jan 2023)

  Changed paths:
    M crypto/x509/v3_admis.c

  Log Message:
  -----------
  Fix incorrect error return value in i2r_ADMISSION_SYNTAX()

The other implementations of i2r return 0 in case of an error, but
i2r_ADMISSION_SYNTAX() returns -1. That means the check on i2r does not
catch the error. Change it to return 0 like the others do.

Fixes: #20066

CLA: trivial

Reviewed-by: Matt Caswell <matt at openssl.org>
Reviewed-by: Tomas Mraz <tomas at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20068)

(cherry picked from commit 53b5d6c30f3b8eaf7a582da2265c0d1cfe14d54f)