4e8f5c52bb
If ddx does not support swap, don't advertise it. This is a hack to work around current xservers which advertise this extension even when it is clearly not supported. When: http://lists.x.org/archives/xorg-devel/2013-February/035449.html is merged in upstream xserver and makes it's way into most distros then this hack can be removed. In the mean time, it is required to allow gnome-shell/clutter/etc to work properly with a DDX driver which does not support ScheduleSwap. Signed-off-by: Rob Clark <robdclark@gmail.com>