filter pointer events by /16, so that the game cursor is not redrawn

needlessly each time the mouse moves by one pixel.

Makes the game playable for me.

okay deanna@

games/micropolis/Makefile

@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.6 2008/01/27 16:34:32 deanna Exp $
+# $OpenBSD: Makefile,v 1.7 2008/01/27 18:16:22 espie Exp $
 
 COMMENT=	city-building simulation
 
@@ -6,6 +6,7 @@ DISTNAME=	micropolis-20080126
 WRKDIST=	${WRKDIR}/micropolis
 WRKSRC=		${WRKDIST}/src
 MAKE_FILE=	makefile
+PKGNAME=	${DISTNAME}p0
 
 CATEGORIES=	games
 

games/micropolis/patches/patch-src_sim_w_tk_c

@@ -0,0 +1,18 @@
+$OpenBSD: patch-src_sim_w_tk_c,v 1.3 2008/01/27 18:16:22 espie Exp $
+--- src/sim/w_tk.c.orig	Sun Jan 27 16:10:47 2008
++++ src/sim/w_tk.c	Sun Jan 27 16:19:46 2008
+@@ -472,11 +472,12 @@ TileViewEventProc(ClientData clientData, XEvent *event
+       view->tool_x = x; view->tool_y = y;
+     }
+ 
++
+ /* XXX: redraw all views showing cursor */
+ /* XXX: also, make sure switching tools works w/out moving */
+     if (((view->tool_showing != last_showing) ||
+-	 (view->tool_x != last_x) ||
+-	 (view->tool_y != last_y))) {
++	 ((view->tool_x >> 4) != (last_x >> 4)) ||
++	 ((view->tool_y >> 4)  != (last_y >> 4)))) {
+ #if 1
+       EventuallyRedrawView(view);
+ #else