[Xcb] mesa +xcb = assertion death

[Jeremy Kolb]

Okay, so I lied about GL on XCB at the moment since the server-side glx 
was being used instead of the client even though it told me otherwise 
and now I can't test it.

So now just running the default mesa (freshly compiled with dri support, 
otherwise it will not work) and set my LD_LIBRARY_PATH to /opt/fdo/lib 
where I keep the Mesa/XCB//X11 --with-xcb libs and now running any GL 
program and I get an assertion failing in xcl/xcblock:92.

Any ideas?

Jeremy