--- a/main_gui.c	Tue May 02 19:52:56 2006 +0000
+++ b/main_gui.c	Tue May 02 21:19:48 2006 +0000
@@ -2472,3 +2472,9 @@
 	ScreenSizeChanged();
 	MarkWholeScreenDirty();
 }
+
+void InitializeMainGui(void)
+{
+	/* Clean old GUI values */
+	_last_built_railtype = 0;
+}