Replaced using NodeCallback::run with explict run() implementation.

git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14322 16af8721-9629-0410-8352-f15c8da7e697

include/osg/ClusterCullingCallback

@@ -34,7 +34,7 @@ class OSG_EXPORT ClusterCullingCallback : public Drawable::CullCallback, public
         META_Object(osg,ClusterCullingCallback);
 
         // use the NodeCallbacks implementation of run.
-        using NodeCallback::run;
+        virtual bool run(osg::Object* object, osg::Object* data) { return NodeCallback::run(object, data); }
 
         /** Computes the control point, normal, and deviation from the
           * given drawable contents. */