Minor clean up.

examples/webgl_loader_bvh.html

@@ -49,7 +49,7 @@
 					skeletonHelper = new THREE.SkeletonHelper( result.skeleton.bones[ 0 ] );
 					skeletonHelper.skeleton = result.skeleton; // allow animation mixer to bind to SkeletonHelper directly
 
-					var boneContainer = new THREE.Object3D();
+					var boneContainer = new THREE.Group();
 					boneContainer.add( result.skeleton.bones[ 0 ] );
 
 					scene.add( skeletonHelper );