+ *
+ * XXX Technically, GETWINDOW( xconfigure ) and
+ * XXX {event.xconfigure} may not be legit ways to get at
+ * XXX data for CreateNotify events. In practice, the data
+ * XXX is in a union which is laid out much the same either
+ * XXX way. But if you want to split hairs, this isn't legit,
+ * XXX and we should instead duplicate some code.