to allo plugins to pass back more information about the success or failure of a file load. All plugins have been updated to the new convention.
This Wavefront OBJ reader is based on the glm file format reader by Nate Robins - http://www.pobox.com/~ndr/ ReaderWriterOBJ.cpp is the OSG code which adapts the library into a osg plugin. Copyright (C) Ulrich Hertlein <u.hertlein@web.de>