Merge pull request #17719 from zeux/gltf-cleanup-ext

GLTFLoader: Use extensionName for extensions[] access consistently

examples/js/loaders/GLTFLoader.js

@@ -181,11 +181,11 @@ THREE.GLTFLoader = ( function () {
 							break;
 
 						case EXTENSIONS.MSFT_TEXTURE_DDS:
-							extensions[ EXTENSIONS.MSFT_TEXTURE_DDS ] = new GLTFTextureDDSExtension( this.ddsLoader );
+							extensions[ extensionName ] = new GLTFTextureDDSExtension( this.ddsLoader );
 							break;
 
 						case EXTENSIONS.KHR_TEXTURE_TRANSFORM:
-							extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ] = new GLTFTextureTransformExtension();
+							extensions[ extensionName ] = new GLTFTextureTransformExtension();
 							break;
 
 						default: