bug#32672: 27.0.50; image resize on window resizing

[martin rudalics]

> This is because of debounce: the selection-change hook is called twice,
> so only the last call is processed.  But the problem is that the
> selection-change hook is called not in the logical order, as would be
> expected, i.e. first in unselected window, then in the selected window.
> But actually it's called in the order of windows in the window list,
> e.g. first the 'selected' event is called if the window was created
> earlier, then the 'deselected' event if the window was created later.
> IOW, the calling order depends on the window order.

This is consistent with running the remaining hooks.  In either case
you can always use 'old-selected-window' to find out what changed.

martin