Xi: add missing call for SProcXChangeDeviceCursor

add DeviceEnterNotify and DeviceLeaveNotify
	fix: QueryDevicePointer crashed if called with keyboard device

include/extinit.h

@@ -109,6 +109,18 @@ SDevicePresenceNotifyEvent (
        devicePresenceNotify * /* to */
        );
 
+void
+SDeviceEnterNotifyEvent (
+        deviceEnterNotify * /* from */,
+        deviceEnterNotify * /* to */
+        );
+
+void
+SDeviceLeaveNotifyEvent (
+        deviceLeaveNotify * /* from */,
+        deviceLeaveNotify * /* to */
+        );
+
 void
 FixExtensionEvents (
 	ExtensionEntry 	*      /* extEntry */