bug#16674: 24.3.50; crash: redisplay_internal, update_frame, using client-daemon in tmux

[Eli Zaretskii]

> From: Mark Oteiza <mvoteiza@udel.edu>
> Date: Sun, 27 Jul 2014 12:51:15 -0400
> 
> With 113891 reverted, a visible frame is always found and selected if
> one closes a client frame, also all the visible clients will always
> respond to resizes.

But what about the original recipes described in #15025?  The change I
made to solve #18112 cannot possibly fix it, because all it does is
fix the calculation of the _dimensions_ of the frame being resized.
So reverting 113891 is almost certainly going to reintroduce #15025.