Fix cloneObject to also copy source.useVertexTexture for SkinnedMesh.

src/extras/SceneUtils.js

@@ -65,7 +65,7 @@ THREE.SceneUtils = {
 
 		} else if ( source instanceof THREE.SkinnedMesh ) {
 
-			object = new THREE.SkinnedMesh( source.geometry, source.material );
+			object = new THREE.SkinnedMesh( source.geometry, source.material, source.useVertexTexture );
 
 		} else if ( source instanceof THREE.Mesh ) {