fix segfault caused by the previous fix and fix bug which does not update the scene_editor->scene when another scene is chosen using the scene chooser
fix segfault caused by the previous fix and fix bug which does not update the scene_editor->scene when another scene is chosen using the scene chooser

git-svn-id: 4705079bc6b8aadf675e3696f5c015a6aa4916e3@5569 3c1deb5b-d424-0410-962d-aba41a686d42

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