bug#21469: 25.0.50; right scrollbar wrongly placed when resizing split window

[martin rudalics]

> That made me take another close look at my DPI settings. Gnome claimed
> not to be using a DPI scaling factor, but I set it to 2, then back to
> 1, and now the scrollbars appear where they should. If I set it to 2
> the problem reappears.
>
> The question now is: is this an emacs or a GTK bug?

Then everything is clear.  Glenn Morris intimately knows the list of
bugs already filed for this issue.  This won't be funny :-(

martin