(svn r11802) -Fix [FS#716]: do not crash trains when leaving depot to a very long track

-Codechange: use dedicated pathfinder for signal updating, resulting in better performance and possible future improvements

src/waypoint.cpp

@@ -29,8 +29,10 @@
 #include "vehicle_func.h"
 #include "vehicle_base.h"
 #include "string_func.h"
+#include "signal_func.h"
 #include "player.h"
 
+
 enum {
 	MAX_WAYPOINTS_PER_TOWN = 64,
 };