bug#36337: 26.1; XBM images are sometimes not displayed correctly

[Eli Zaretskii]

> From: Pip Cet <pipcet@gmail.com>
> Date: Sun, 30 Jun 2019 17:12:53 +0000
> Cc: triska@metalevel.at, 36337@debbugs.gnu.org
> 
> From a10f0e6d67521ca1598ea0dd18cca0829eded517 Mon Sep 17 00:00:00 2001
> From: Pip Cet <pipcet@gmail.com>
> Date: Sat, 29 Jun 2019 07:15:52 +0000
> Subject: [PATCH] Allow a :stride argument so XBM boolvecs are in the right
>  format.
> 
> Bug#36337
> 
> * src/image.c (xbm_image_p): Explicitly specify the right stride if a
>   bool vector is used as argument.
> * doc/lispref/display.texi (XBM Images): Describe bool vectors
>   accurately.
> * etc/NEWS: Document the change.

This is fine, thanks.