Changed the prototype from NULL to osg::DummyObject to address a bug in reading .osgt + .osgx where an image is written out but fails to read the file causes subsequent parts of the file to be mis-read
Changed the prototype from NULL to osg::DummyObject to address a bug in reading .osgt + .osgx where an image is written out but fails to read the file causes subsequent parts of the file to be mis-read

omega-hub/osg,omega-hub/osg,omega-hub/osg,omega-hub/osg