Added overide of the SceneHandler::clear() making it a no-op. Will revisit

this implemention later.

include/osgProducer/OsgSceneHandler

@@ -26,18 +26,19 @@ class OSGPRODUCER_EXPORT OsgSceneHandler : public Producer::Camera::SceneHandler
 {
     public :
     
-        OsgSceneHandler( osg::DisplaySettings *ds = NULL);
+        OsgSceneHandler(osg::DisplaySettings *ds = NULL);
 
         /// override the init method to force it be run one at a time.
         virtual void init();
 
-        void cull(Producer::Camera &cam);
+        virtual void clear(Producer::Camera& camera);
 
-        void draw(Producer::Camera &);
+        virtual void cull(Producer::Camera& camera);
+
+        virtual void draw(Producer::Camera& camera);
 
         void setContextID( int id );
 
-
     protected:
     
         virtual ~OsgSceneHandler() {}

src/osgProducer/OsgSceneHandler.cpp

@@ -38,6 +38,10 @@ void OsgSceneHandler::init()
     osg::notify(osg::INFO)<<"   unlocked "<<this<<" init."<<std::endl;
 }
 
+void OsgSceneHandler::clear(Producer::Camera& /*camera*/)
+{
+    // no-op right now as scene view manages its own cleaer.
+}
 
 void OsgSceneHandler::cull(Producer::Camera &cam) 
 {