[openssl/openssl] 0a69ca: Avoid possible divide by zero

[Tomáš Mráz]

  Branch: refs/heads/openssl-3.0
  Home:   https://github.com/openssl/openssl
  Commit: 0a69ca8f635f88b0488c5684410f97e22346c0bc
      https://github.com/openssl/openssl/commit/0a69ca8f635f88b0488c5684410f97e22346c0bc
  Author: Tomas Mraz <tomas at openssl.org>
  Date:   2023-01-04 (Wed, 04 Jan 2023)

  Changed paths:
    M ssl/record/ssl3_record.c

  Log Message:
  -----------
  Avoid possible divide by zero

Backport of commit 624efd2

Reviewed-by: Hugo Landau <hlandau at openssl.org>
Reviewed-by: Richard Levitte <levitte at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19967)

(cherry picked from commit 8c29e5ebfd5f19442422ba43fea4c95816417e34)