dix: fix EnqueueEvent to work with internal events.

Note that we're only partially switched to internal events. The event in the
devices' event queue (dev->deviceGrab.sync.event) is still an XI event. The
events in syncEvents are InternalEvents only now.
This also implies fixing CheckVirtualMotion to work with internal events.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

include/inputstr.h

@@ -516,8 +516,7 @@ typedef struct _QdEvent {
     DeviceIntPtr	device;
     ScreenPtr		pScreen;	/* what screen the pointer was on */
     unsigned long	months;		/* milliseconds is in the event */
-    xEvent		*event;
-    int			evcount;
-} QdEventRec;    
+    InternalEvent	*event;
+} QdEventRec;
 
 #endif /* INPUTSTRUCT_H */