[openssl/openssl] 2aba95: Correct tag len check when determining how much sp...

[Matt Caswell]

  Branch: refs/heads/openssl-3.2
  Home:   https://github.com/openssl/openssl
  Commit: 2aba9548c4a0a3f8359ab5476df3ad58f1cbcf06
      https://github.com/openssl/openssl/commit/2aba9548c4a0a3f8359ab5476df3ad58f1cbcf06
  Author: Matt Caswell <matt at openssl.org>
  Date:   2023-11-15 (Wed, 15 Nov 2023)

  Changed paths:
    M ssl/quic/quic_record_tx.c

  Log Message:
  -----------
  Correct tag len check when determining how much space we have in the pkt

If the available space is equal to the tag length then we have no available
space for plaintext data.

Fixes #22699

Reviewed-by: Hugo Landau <hlandau at openssl.org>
Reviewed-by: Tomas Mraz <tomas at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22715)

(cherry picked from commit 46376fcf4b6d11ec417c2a530475037d4d09fcbf)