bug#8869: Unjustified selection time-out

[Chong Yidong]

Glenn Morris <rgm@gnu.org> writes:

> Similar problems using current trunk on RHEL6.2 under XFCE 4.8:
>
> emacs -Q
> C-SPC M-< M-w
> C-x C-c

Hmm, I couldn't reproduce this, also on XFCE 4.8.  But I did see the
timeout problem when clicking on the "close window" button rather than
doing C-x C-c.  There, the problem is that when Emacs is waiting for the
selection request from the clipboard manager, swallow_events doesn't get
to handle the selection request event because there's a
DELETE_WINDOW_EVENT sitting in the keyboard buffer in front of it.

I committed a changed to make process_special_events deal with all X
selection events in the keyboard fifo buffer.  Does that happen to fix
things for you?