Watch for individual scene viewer destroy notifications in gtk_cmiss_scene_viewer instead of Cmiss_scene_viewer_package destroy.
Watch for individual scene viewer destroy notifications in gtk_cmiss_scene_viewer instead of Cmiss_scene_viewer_package destroy.

git-svn-id: 4705079bc6b8aadf675e3696f5c015a6aa4916e3@5392 3c1deb5b-d424-0410-962d-aba41a686d42

hsorby/zinc,hsorby/zinc,OpenCMISS/zinc,hsorby/zinc,hsorby/zinc,OpenCMISS/zinc,OpenCMISS/zinc,OpenCMISS/zinc