bug#72245: [PATCH] Fix integer overflow when reading XPM

[Eli Zaretskii]

> From: Andreas Schwab <schwab@linux-m68k.org>
> Cc: Stefan Kangas <stefankangas@gmail.com>,  luangruo@yahoo.com,
>   72245@debbugs.gnu.org
> Date: Tue, 23 Jul 2024 19:39:16 +0200
> 
> On Jul 23 2024, Eli Zaretskii wrote:
> 
> > That file doesn't cause a crash on MS-Windows, FWIW, but the code
> > which processes XPM images in Emacs on Windows is very different.
> 
> The absence of a crash does not prove anything, though.

It isn't the absence of a crash alone.  I see an error message in
*Messages* saying the XPM image is invalid, and the window shows an
empty rectangle, as always with invalid images.  So Emacs actually
detects that the image is invalid, announces that, and doesn't try to
show it on the screen.