Fixed check against Drawable::isCullingActive().
Fixed check against Drawable::isCullingActive().

Removed old code intended to check the Geode parent of a Drawable to see if it's CullingActive is true as this was broken by the change osg::Drawable being derived from osg::Node rather than osg::Object.

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