--- a/src/station.cpp	Sat Oct 25 13:51:47 2008 +0000
+++ b/src/station.cpp	Sat Oct 25 14:19:09 2008 +0000
@@ -246,6 +246,28 @@
 	return (had_vehicle_of_type & HVOT_BUOY) != 0;
 }
 
+/** Determines the catchment radius of the station
+ * @return The radius
+ */
+uint Station::GetCatchmentRadius() const
+{
+	uint ret = CA_NONE;
+
+	if (_settings_game.station.modified_catchment) {
+		if (this->bus_stops    != NULL) ret = max<uint>(ret, CA_BUS);
+		if (this->truck_stops  != NULL) ret = max<uint>(ret, CA_TRUCK);
+		if (this->train_tile   != 0)    ret = max<uint>(ret, CA_TRAIN);
+		if (this->dock_tile    != 0)    ret = max<uint>(ret, CA_DOCK);
+		if (this->airport_tile != 0)    ret = max<uint>(ret, this->Airport()->catchment);
+	} else {
+		if (this->bus_stops != NULL || this->truck_stops != NULL || this->train_tile != 0 || this->dock_tile != 0 || this->airport_tile != 0) {
+			ret = CA_UNMODIFIED;
+		}
+	}
+
+	return ret;
+}
+
 
 /************************************************************************/
 /*                     StationRect implementation                       */

--- a/src/station_base.h	Sat Oct 25 13:51:47 2008 +0000
+++ b/src/station_base.h	Sat Oct 25 14:19:09 2008 +0000
@@ -195,6 +195,8 @@
 	 * @return true if and only is the station exists
 	 */
 	inline bool IsValid() const { return this->xy != 0; }
+
+	uint GetCatchmentRadius() const;
 };
 
 static inline StationID GetMaxStationIndex()

--- a/src/station_cmd.cpp	Sat Oct 25 13:51:47 2008 +0000
+++ b/src/station_cmd.cpp	Sat Oct 25 14:19:09 2008 +0000
@@ -97,24 +97,6 @@
 }
 
 
-/** Calculate the radius of the station. Basicly it is the biggest
- *  radius that is available within the station
- * @param st Station to query
- * @return the so calculated radius
- */
-static uint FindCatchmentRadius(const Station *st)
-{
-	uint ret = CA_NONE;
-
-	if (st->bus_stops   != NULL) ret = max<uint>(ret, CA_BUS);
-	if (st->truck_stops != NULL) ret = max<uint>(ret, CA_TRUCK);
-	if (st->train_tile  != 0)    ret = max<uint>(ret, CA_TRAIN);
-	if (st->dock_tile   != 0)    ret = max<uint>(ret, CA_DOCK);
-	if (st->airport_tile)        ret = max<uint>(ret, st->Airport()->catchment);
-
-	return ret;
-}
-
 #define CHECK_STATIONS_ERR ((Station*)-1)
 
 static Station *GetStationAround(TileIndex tile, int w, int h, StationID closest_station)
@@ -575,7 +557,7 @@
 			TileXY(rect.left, rect.bottom),
 			rect.right - rect.left   + 1,
 			rect.top   - rect.bottom + 1,
-			_settings_game.station.modified_catchment ? FindCatchmentRadius(st) : (uint)CA_UNMODIFIED
+			st->GetCatchmentRadius()
 		);
 	} else {
 		memset(accepts, 0, sizeof(accepts));
@@ -2907,7 +2889,7 @@
 			const int y_min_prod = max_rad + 1;
 			const int y_max_prod = max_rad + h_prod;
 
-			int rad = FindCatchmentRadius(st);
+			int rad = st->GetCatchmentRadius();
 
 			int x_dist = min(w_cur - x_min_prod, x_max_prod - w_cur);
 			if (w_cur < x_min_prod) {