Re: emacs-28 d791cd5: Fix '(space :relative-width N)' display spec w/non-ASCII chars

[Eli Zaretskii <eliz@gnu.org>]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: Eli Zaretskii <eliz@gnu.org>
> Date: Tue, 23 Nov 2021 09:39:13 +0100
> 
> eliz@gnu.org (Eli Zaretskii) writes:
> 
> >     Fix '(space :relative-width N)' display spec w/non-ASCII chars
> 
> This apparently leads to the following compilation warning (on master,
> at least):
> 
> In file included from composite.h:29,
>                  from xdisp.c:441:
> xdisp.c: In function 'produce_stretch_glyph':
> dispextern.h:1891:10: warning: 'face' may be used uninitialized in this function [-Wmaybe-uninitialized]
>  1891 |   return face_for_char (f, face, character, pos, object);
>       |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> xdisp.c:30063:16: note: 'face' was declared here
> 30063 |   struct face *face;
>       |                ^~~~

Stupid compiler, which cannot get its act together wrt conditions,
shouldn't attempt to issue warnings about code it didn't understand.

I hope I fixed this now (assuming we won't see a different bogus
warning).

Thanks.