From Sukender, "FBX writer was writing an empty file when the scene had a root node being a Geode.
This was caused be the change in Drawable (now derived from Node) and Geode (now derived from Group).
This fix simply sticks with previous behaviour. Another change could be to adapt WriterNodeVisitor.
"


git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14608 16af8721-9629-0410-8352-f15c8da7e697