bug#37153: 26.1; some png images scrambled

[Eli Zaretskii <eliz@gnu.org>]

> Date: Sun, 25 Aug 2019 13:19:24 +0900
> From: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>
> Cc: winkler@gnu.org,
> 	37153@debbugs.gnu.org,
> 	eggert@cs.ucla.edu
> 
> > > --- a/src/image.c
> > > +++ b/src/image.c
> > > @@ -6680,7 +6680,7 @@ png_load_body (struct frame *f, struct image *img,
> > > struct png_load_context *c)
> > >    /* Create an image and pixmap serving as mask if the PNG image
> > >       contains an alpha channel.  */
> > >    if (channels == 4
> > > -      && !transparent_p
> > > +      && transparent_p
> > >        && !image_create_x_image_and_pixmap (f, img, width, height, 1,
> > >  					   &mask_img, 1))
> > >      {
> > > 
> > 
> > That didn't change anything in how I see the image in question, FWIW.
> 
> Attached is a screenshot on X11.  Probably W32 needs some more work.

I always see the 3rd image, no matter what face is specified, FWIW.