bug#69478: 30.0.50; Emacs dies after scrolling in eww

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: Alexander Prähauser <ahprae@protonmail.com>,  Eli
>  Zaretskii
>  <eliz@gnu.org>,  69478@debbugs.gnu.org
> Date: Fri, 01 Mar 2024 09:52:58 +0800
> 
> Michael Heerdegen <michael_heerdegen@web.de> writes:
> 
> > For the record: I can display this page normally using emacs -Q and
> > Emacs does not crash.
> >
> > Michael.
> 
> The problem almost certainly lies in one of the image library bindings
> in image.c creating images for TrueColor-24 visuals irrespective of the
> visual's actual depth.

Which bindings in image.c do that, and how can we prevent problems
such as this one due to doing so?