Added protection to prevent crashes on calls when no data is set up
Added protection to prevent crashes on calls when no data is set up


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