Fixed warning


git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14537 16af8721-9629-0410-8352-f15c8da7e697
Fixed warnings.


git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14539 16af8721-9629-0410-8352-f15c8da7e697