From Laurens Voerman, "attached is a modified version of src/osgUtil/Tessellator.cpp
current code checks for a Nullpointer and on notify level info or above will inform you with a crash, by dereferencing it."


git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14315 16af8721-9629-0410-8352-f15c8da7e697