bug#32637: 27.0.50; window-size-change-functions not run from local hook

[Juri Linkov <juri@linkov.net>]

>> window-size-change-functions calling code could detect if a window with
>> a buffer-local hook changed its size, and not to call its hook in this
>> case.  This would be even better than using global hook where you can't
>> implement such optimization.
>
> Agreed.
>
>> window-size-change-functions calling code could call it only once
>> for every frame, even if the same buffer is displayed in multiple
>> windows.
>
> Agreed.
>
>> I see that it's not called when the buffer is not displayed in any
>> window on the frame - this is correct.  But what I noted earlier is that
>> it's not called when the buffer with the buffer-local hook is not the
>> current-buffer in the selected window (but it's displayed in a
>> non-selected window on the frame) - this should be fixed to call the hook
>> regardless if its window is currently selected or not.
>
> Agreed.  I attach an untested and undocumented patch.  Please have a
> look.

Thank you for the patch.  I tried it and it works without problems.
I'm testing it on the image window resizing in bug#32672
and it calls window-size-change-functions regardless if the current
buffer is in image-mode, or if the image buffer in another window.