(svn r11265) -Feature: Make more advanced rail types more expensive to build.

src/rail.cpp

@@ -107,6 +107,12 @@ extern const TrackBits _corner_to_trackbits[] = {
 	TRACK_BIT_LEFT, TRACK_BIT_LOWER, TRACK_BIT_RIGHT, TRACK_BIT_UPPER,
 };
 
+/* The default multiplier for the cost of building different types of railway
+ * track, which will be divided by 8. Can be changed by newgrf files. */
+const int _default_railtype_cost_multiplier[RAILTYPE_END] = {
+	8, 12, 16, 24,
+};
+int _railtype_cost_multiplier[RAILTYPE_END];
 
 RailType GetTileRailType(TileIndex tile)
 {