bug#7348: 23.2.50; Emacs crashes on fast window resize with scrollbars on under OSX

[Eli Zaretskii]

> Date: Tue, 09 Nov 2010 18:52:48 +0100
> From: martin rudalics <rudalics@gmx.at>
> CC: mituharu@math.s.chiba-u.ac.jp, yacoob@gmail.com, 
>  7348@debbugs.gnu.org
> 
> If I can't accomodate all of them, I make the frame's selected
> window the frame's root window, deleting all other windows.

That's a bit drastic, isn't it?  All we need is delete a single
window, and we end up deleting all the rest?