bug#16028: 24.3.50; Latest build completely breaks my thumnail frames code

[martin rudalics]

>> If there are no errors, x_set_font inevitably calls x_new_font which on
>> window inevitably calls x_set_window_size which inevitably calls
>> my_set_window_pos.
>
> But my_set_window_pos just tells Windows to redraw the frame according
> to the current dimensions.  It's the current dimensions that need to
> be changed, and that is done by redisplay, when it notices that the
> font was changed and therefore the dimensions of the glyph matrices
> need to be updated.

my_set_window_pos sends a resize request to Windows so the frame size
should visibly change.  redisplay then can do whatever it wants - but it
can't undo the frame size change.

>> BTW I could hardly analyze this at the moment because now I'm bitten by
>> the "modeline doesn't update correctly" virus.  `find-tag-noselect',
>> when trying to go to the definition of x_new_font, switches from
>> nsterm.m to w32term.c to xterm.c as expected but after going to nsterm.m
>> the modeline buffer id is stuck at nsterm.m.
>
> Probably due to Stefan's changes.  "M-x redraw-display RET" should put
> you out of your misery.  (It's entirely possible that just "M-x" will
> do.)

I filed a bug report.

martin