bug#23925: 25.0.95; display broken when maximizing frame

[martin rudalics]

> In the meanwhile, I have also built the cairo port with lucid and
> motif.  In both case emacs shows the same bug as the gtk build.
> Again, I can provide more details as needed, though I expect that
> you are better off with your own builds.

I'm afraid I can't do much about this anyway.  All these builds are
seriously flawed in many aspects.  People should use them _exclusively_
for fixing these flaws.

martin