(svn r27163) -Fix [FS#6204]: Toolbars were not invalidated when changing max-vehicles settings. (adf88)

src/rail_gui.cpp

@@ -434,6 +434,18 @@ struct BuildRailToolbarWindow : Window {
 		if (_settings_client.gui.link_terraform_toolbar) DeleteWindowById(WC_SCEN_LAND_GEN, 0, false);
 	}
 
+	/**
+	 * Some data on this window has become invalid.
+	 * @param data Information about the changed data.
+	 * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
+	 */
+	virtual void OnInvalidateData(int data = 0, bool gui_scope = true)
+	{
+		if (!gui_scope) return;
+
+		if (!CanBuildVehicleInfrastructure(VEH_TRAIN)) delete this;
+	}
+
 	/**
 	 * Configures the rail toolbar for railtype given
 	 * @param railtype the railtype to display