From Mike Wittman, "Here is a change to the .cpp file to fix it by disambiguating the cull invocation."

include/osg/ClusterCullingCallback

@@ -54,6 +54,10 @@ class OSG_EXPORT ClusterCullingCallback : public Drawable::CullCallback, public
         void setDeviation(float deviation) { _deviation = deviation; }
         float getDeviation() const { return _deviation; }
 
+        /* Not all virtual overloads of drawImplementation are overridden in this class, so
+           bring the base class implementation in to avoid hiding the non-used ones. */
+        using Drawable::CullCallback::cull;
+
         virtual bool cull(osg::NodeVisitor*, osg::Drawable*, osg::State*) const;
 
         /** Callback method called by the NodeVisitor when visiting a node.*/

src/osg/ClusterCullingCallback.cpp

@@ -194,7 +194,7 @@ void ClusterCullingCallback::operator()(Node* node, NodeVisitor* nv)
 {
     if (nv)
     {
-        if (cull(nv,0,0)) return;
+        if (cull(nv,0,static_cast<State *>(0))) return;
         
         traverse(node,nv); 
     }