Log Message:
libX11: update to 1.6.7.

Bhavi Dhingra (1):
     XcmsLookupColor: fully initialize XColor structs passed to _XColor_to_XcmsRGB

Matt Turner (1):
     libX11 1.6.7

Michel Dänzer (2):
     poll_for_response: Call poll_for_event again if xcb_poll_for_reply fails
     poll_for_event: Allow using xcb_poll_for_queued_event