(svn r6718) -Codechange: added function to get the line height for a vehicle type

-Fix r6513: [depot window] fixed incorrect line height for large ships
-Fix r6513: [depot window] fixed incorrect resizing of the sell button

vehicle_gui.h

@@ -68,4 +68,9 @@ static inline void DrawVehicleImage(const Vehicle *v, int x, int y, int count, i
 	}
 }
 
+static inline byte GetVehicleListHeight(byte type)
+{
+	return (type == VEH_Train || type == VEH_Road) ? 14 : 24;
+}
+
 #endif /* VEHICLE_GUI_H */