(svn r23506) -Add: [NoAI] Support for dealing with aircraft range.

src/script/api/script_engine.hpp

@@ -250,6 +250,16 @@ public:
 	 * @return The PlaneType the engine has.
 	 */
 	static ScriptAirport::PlaneType GetPlaneType(EngineID engine_id);
+
+	/**
+	 * Get the maximum allowed distance between two orders for an engine.
+	 * @param vehicle_id The engine to get the max distance for.
+	 * @pre IsValidEngine(engine_id).
+	 * @return The maximum distance between two orders for the engine
+	 *  or 0 if the distance is unlimited.
+	 * @see ScriptOrder::GetOrderDistance
+	 */
+	static uint GetMaximumOrderDistance(EngineID engine_id);
 };
 
 #endif /* SCRIPT_ENGINE_HPP */