(svn r15617) -Change [FS#2694]: vehicle variables 40-43 weren't cached (though spec stated they are). Caching these variables can yield a 10+% speed increase when those vehicle variables are queried often.

src/vehicle_base.h

@@ -323,6 +323,12 @@ public:
 		VehicleShip ship;
 	} u;
 
+	/* cached oftenly queried NewGRF values */
+	uint8 cache_valid;   ///< Whether the caches are valid
+	uint32 cached_var40; ///< Cache for NewGRF var 40
+	uint32 cached_var41; ///< Cache for NewGRF var 41
+	uint32 cached_var42; ///< Cache for NewGRF var 42
+	uint32 cached_var43; ///< Cache for NewGRF var 43
 
 	/**
 	 * Allocates a lot of vehicles.