Object3D: Fixed traverseVisible.

src/core/Object3D.js

@@ -414,7 +414,7 @@ THREE.Object3D.prototype = {
 
 		for ( var i = 0, l = this.children.length; i < l; i ++ ) {
 
-			this.children[ i ].traverse( callback );
+			this.children[ i ].traverseVisible( callback );
 
 		}