Added StatsHandler to osgtessellationshaders example to test out rendering bug associated with stats rendering.

git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14807 16af8721-9629-0410-8352-f15c8da7e697

examples/osgtessellationshaders/osgtessellationshaders.cpp

@@ -296,6 +296,7 @@ int main(int argc, char* argv[])
     }
 
     viewer.addEventHandler(new KeyboardEventHandler(tessInnerU, tessOuterU));
+    viewer.addEventHandler(new osgViewer::StatsHandler);
     viewer.setSceneData(geode.get());
     return viewer.run();
 }