Xi: if the device is currently grabbed, flag the barrier event

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Jasper St. Pierre <jstpierre@mecheye.net>

Xi/exevents.c

@@ -1655,6 +1655,9 @@ ProcessBarrierEvent(InternalEvent *e, DeviceIntPtr dev)
     if (dixLookupWindow(&pWin, be->window, serverClient, DixReadAccess) != Success)
         return;
 
+    if (grab)
+        be->flags |= XIBarrierDeviceIsGrabbed;
+
     rc = EventToXI2(e, &ev);
     if (rc != Success) {
         ErrorF("[Xi] event conversion from %s failed with code %d\n", __func__, rc);