(svn r19660) -Feature: [NewGRF] support cb36 for aircraft speed also in the build menu

src/engine.cpp

@@ -290,8 +290,13 @@ uint Engine::GetDisplayMaxSpeed() const
 		case VEH_SHIP:
 			return GetEngineProperty(this->index, PROP_SHIP_SPEED, this->u.ship.max_speed) / 2;
 
-		case VEH_AIRCRAFT:
+		case VEH_AIRCRAFT: {
+			uint max_speed = GetEngineProperty(this->index, PROP_AIRCRAFT_SPEED, 0);
+			if (max_speed != 0) {
+				return (max_speed * 129) / 10;
+			}
 			return this->u.air.max_speed;
+		}
 
 		default: NOT_REACHED();
 	}