[openssl/openssl] bb2bbd: Fix a compilation failure in bio_comp_test.c

[Matt Caswell]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/openssl
  Commit: bb2bbd53d49c510c2ae705d86e8fd2ed829cbd92
      https://github.com/openssl/openssl/commit/bb2bbd53d49c510c2ae705d86e8fd2ed829cbd92
  Author: Matt Caswell <matt at openssl.org>
  Date:   2022-10-24 (Mon, 24 Oct 2022)

  Changed paths:
    M test/bio_comp_test.c

  Log Message:
  -----------
  Fix a compilation failure in bio_comp_test.c

Compiling with clang, --strict-warnings and enable-zlib-dynamic resulted
in a compilation failure. This fixes it.

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Dmitry Belyavskiy <beldmit at gmail.com>
(Merged from https://github.com/openssl/openssl/pull/19480)