Fixed setThreadModel method so that is doesn't try to set up threading unless the viewer is realized
Fixed setThreadModel method so that is doesn't try to set up threading unless
the viewer is realized


git-svn-id: 23b6355f2bb369032457de4eb5f713ee134f73a8@6119 16af8721-9629-0410-8352-f15c8da7e697

joevandyk/osg,joevandyk/osg,joevandyk/osg,joevandyk/osg,joevandyk/osg