Updates to the flush rendering objects function calls to allow for

managment of amount of time available to do gl delete's.  This control is
required for constant frame rate applications.

src/osgProducer/Viewer.cpp

@@ -309,7 +309,9 @@ public:
             
             sh.drawImplementation(camera);
 
-            _databasePager->compileRenderingObjects(*(sh.getSceneView()->getState()));
+            double availableTime = 0.005; //  5 ms
+
+            _databasePager->compileRenderingObjects(*(sh.getSceneView()->getState()),availableTime);
        }
        
        osg::ref_ptr<DatabasePager> _databasePager;