diff -ruN magicpoint-1.11b.orig/x11.c magicpoint-1.11b/x11.c
--- magicpoint-1.11b.orig/x11.c	2004-07-08 15:09:54.000000000 +0900
+++ magicpoint-1.11b/x11.c	2004-11-11 15:32:32.446013165 +0900
@@ -362,7 +362,7 @@
 	static fullscreen = 0;
 	XClientMessageEvent  xev;
 
-	fullscreen = ++fullscreen % 2;
+	fullscreen = (fullscreen + 1) % 2;
 	memset(&xev, 0, sizeof(xev));
 	xev.type=ClientMessage;
 	xev.message_type=XInternAtom(display, "_NET_WM_STATE", False);