[Xcb] Assert in xcb_io.c:542

[Jamey Sharp]

Hi Graeme,

In case you didn't see the thread, ajax believes he's identified the
root cause of this problem with dispwin. He's fixed it in X.org git, and
I reviewed his fix; and I guess he's provided updated packages for
Fedora 12. See
	https://bugzilla.redhat.com/show_bug.cgi?id=498931

I'm hoping you can confirm with your bug-reporter that this fixes the
problem.

Jamey