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Fix use after free warning in compmatch.c

X-seq: zsh-workers 50738
From: Wesley Schwengle <wesleys@xxxxxxxxxxxxxxx>
To: zsh-workers@xxxxxxx
Subject: Fix use after free warning in compmatch.c
Date: Tue, 4 Oct 2022 13:53:33 -0400
Archived-at: <https://zsh.org/workers/50738>
List-id: <zsh-workers.zsh.org>

While compiling zsh from git on Debian with gcc 12.2.0 I came across the
following warning:

compmatch.c:2081:26: warning: pointer ‘or’ used after ‘realloc’ [-Wuse-after-free]

With the help of #zsh, with phy1729 and Mikachu in particular, it is solved
with the following patch.

If someone has a better solution to fix the warning, than this is merely a
notice of saying I got a warning while running make with the latest and
greatest zsh.

Cheers,
Wesley

Follow-Ups:
- [PATCH] Silence use-after-free warning in compmatch.c
  - From: Wesley Schwengle

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