Fixed bug in ProxyNode write out where non existant children were written out.
Fixed bug in ProxyNode write out where non existant children were written out.


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