Added back in the call to drawPreRenderStages() as this shouldn't interfere with the stereo code in SceneView as RenderStage should automatically only allow themselves to be draw on per frame.
Added back in the call to drawPreRenderStages() as this shouldn't interfere
with the stereo code in SceneView as RenderStage should automatically only
allow themselves to be draw on per frame.


marchelbling/osg,scrawl/osg,artoolkit/osg,tomasthoresen/osg,scrawl/osg,scrawl/osg,jtorresfabra/osg,tomasthoresen/osg,openscenegraph/osg,jtorresfabra/osg,jtorresfabra/osg,openscenegraph/osg,jtorresfabra/osg,marchelbling/osg,marchelbling/osg,artoolkit/osg,artoolkit/osg,artoolkit/osg,marchelbling/osg,openscenegraph/osg,tomasthoresen/osg,scrawl/osg,openscenegraph/osg,tomasthoresen/osg