Merge branch 'pr-230' into jgrpp

src/settings_type.h

@@ -375,6 +375,8 @@ struct GameCreationSettings {
 	byte   min_river_length;                 ///< the minimum river length
 	byte   river_route_random;               ///< the amount of randomicity for the route finding
 	byte   amount_of_rivers;                 ///< the amount of rivers
+	uint8  amount_of_rocks;                  ///< the amount of rocks
+	uint8  height_affects_rocks;             ///< the affect that map height has on rocks
 };
 
 /** Settings related to construction in-game */