bug#32672: 27.0.50; image resize on window resizing

[martin rudalics]

> I agree that the buffer list is more global than a window, but OTOH
> it makes sense to use buffer-local hook for a buffer to get notified
> when it comes to the top of the buffer list.  So this would be a good thing
> to have, unless there is another hook that gets called when a buffer
> becomes the current buffer, or at least displayed in a window.

I try to fix the problem you mentioned earlier, namely that

> > it's called only when navigating away from the
> > image-mode buffer, but not when coming back to the image-mode buffer, e.g.
> > `C-x <left>', then resize the window, then type `C-x <right>',
> > it's not called.  Also it's not called in another direction:
> > `C-x <right>', then resize the window, then type `C-x <left>'.

Please tell me if the attached patch works and what else should be
done.

Thanks, martin

buffer-list-update-hook.diff
Description: Text document