Fix minor timestamp lossage in mieq.

Replace miSprite implementation with Damage-based one. Otherwise damage and
    misprite conflict causing looping.
Change pScreen usage around a bit to eliminate warnings

mi/mieq.c

@@ -123,6 +123,8 @@ mieqEnqueue (e)
 	miEventQueue.events[oldtail].event.u.keyButtonPointer.time =
 	    miEventQueue.lastEventTime;
     }
+    miEventQueue.lastEventTime =
+	miEventQueue.events[oldtail].event.u.keyButtonPointer.time;
     miEventQueue.events[oldtail].pScreen = miEventQueue.pEnqueueScreen;
 }