[ACR21.4] Fix `focus-frame' on X

[Michael Sperber]

Try this on X:

(let ((frame (selected-frame)))
  (make-frame)
  (focus-frame frame))

Note how the focus hasn't reverted to the original frame.  The problem
is that the timestamp passed to XSetInputFocus doesn't (always) match.

2009-10-01  Mike Sperber  <mike at xemacs.org>

	* frame-x.c (x_focus_on_frame): Use correct timestamp with
	XSetInputFocus.
-- 
Cheers =8-} Mike
Friede, Völkerverständigung und überhaupt blabla
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