bug#19721: 25.0.50; Mode-line not redrawn with expose events

[martin rudalics]

>> So you mean that we have to update the mode lines of both - the selected
>> and the deselected window?
>
> Yes, but not because they become selected/deselected, because their
> glyph matrices are resized, and the mode-line row gets disabled in the
> process.

But the glyph matrices are resized _because_ the window gets
(de-)selected?  In the OP's case, obviously.

martin