Addd OsgSceneHandler::s/getCleanUpOnNextFrame() and support for it in the draw() method,

when CleanUpOnNextFrame is enabled the next frame simple deleted OpenGL objects without doing any draw traversal.

src/osgProducer/OsgCameraGroup.cpp

@@ -736,7 +736,7 @@ void OsgCameraGroup::cleanup_frame()
         ++itr)
     {
         (*itr)->getSceneView()->releaseAllGLObjects();
-        (*itr)->setFlushOfAllDeletedGLObjectsOnNextFrame(true);
+        (*itr)->setCleanUpOnNextFrame(true);
     }
     
     // make sure that the registry all flushes all its texture objects.

src/osgProducer/OsgSceneHandler.cpp

@@ -26,6 +26,7 @@ OsgSceneHandler::OsgSceneHandler( osg::DisplaySettings *ds) :
     _frameStartTick = 0;
     _previousFrameStartTick = 0;
     _flushOfAllDeletedGLObjectsOnNextFrame = false;
+    _cleanUpOnNextFrame = false;
 }
 
 void OsgSceneHandler::init()

src/osgWrappers/osgProducer/OsgSceneHandler.cpp

@@ -45,6 +45,9 @@ BEGIN_OBJECT_REFLECTOR(osgProducer::OsgSceneHandler)
 	I_Method1(void, setContextID, IN, int, id);
 	I_Method1(void, setFlushOfAllDeletedGLObjectsOnNextFrame, IN, bool, flag);
 	I_Method0(bool, getFlushOfAllDeletedGLObjectsOnNextFrame);
+	I_Method1(void, setCleanUpOnNextFrame, IN, bool, flag);
+	I_Method0(bool, getCleanUpOnNextFrame);
+	I_Property(bool, CleanUpOnNextFrame);
 	I_Property(osgProducer::OsgSceneHandler::Callback *, ClearCallback);
 	I_WriteOnlyProperty(int, ContextID);
 	I_Property(osgProducer::OsgSceneHandler::Callback *, CullCallback);