instead of osgDB::Registry where it original lay. This has been done to allow
fileName strings to be encode data rather than just file names, such as one
requires when using PagedLOD along with plugins for doing dynamic tesselation.
>Fixed: The iv loader that uses Inventor library has a little bug, if used with
>osgconv, it doesn't write the images to the converted file because it's
>not setting the osg::Image->setFilename()