Loader: Warn also with mapAmbient. See #8034.

src/loaders/Loader.js

@@ -137,7 +137,8 @@ THREE.Loader.prototype = {
 						json.blending = THREE[ value ];
 						break;
 					case 'colorAmbient':
-						console.warn( 'THREE.Loader.createMaterial: colorAmbient is no longer supported' );
+					case 'mapAmbient':
+						console.warn( 'THREE.Loader.createMaterial:', name, 'is no longer supported.' );
 						break;
 					case 'colorDiffuse':
 						json.color = color.fromArray( value ).getHex();