bug#10500: 23.3.50; wrong relief display for sliced images

[Eli Zaretskii]

> From: Chong Yidong <cyd@gnu.org>
> Date: Sat, 01 Dec 2012 10:38:10 +0800
> Cc: 10500-done@debbugs.gnu.org
> 
> YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp> writes:
> 
> > You can observe that the image reliefs are displayed unclipped in the
> > following examples for sliced images:
> >
> > I created a patch below for X11 and tried porting it for W32, but I
> > can't test it the latter.
> 
> Thanks, I went ahead and committed your patch to trunk.

It's hard for me to say whether the changes work correctly on
MS-Windows, since there was no image attached to the bug report to
show the correct and the incorrect display.  But at least the changes
compile on Windows and I do see a difference in the way the test case
is displayed before and after the change.

Thanks.