--- a/src/viewport_type.h	Wed May 07 13:11:33 2008 +0000
+++ b/src/viewport_type.h	Wed May 07 13:18:33 2008 +0000
@@ -24,6 +24,12 @@
 	ZoomLevel zoom;
 };
 
+struct ViewportSign {
+	int32 left;
+	int32 top;
+	byte width_1, width_2;
+};
+
 enum {
 	ZOOM_IN   = 0,
 	ZOOM_OUT  = 1,