Fixed handling of null pointer
Fixed handling of null pointer

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