From Matthew May, fixes for threading problems under FreeBSD build.
From Matthew May, fixes for threading problems under FreeBSD build.


tomasthoresen/osg,scrawl/osg,tomasthoresen/osg,tomasthoresen/osg,jtorresfabra/osg,marchelbling/osg,artoolkit/osg,marchelbling/osg,scrawl/osg,artoolkit/osg,tomasthoresen/osg,jtorresfabra/osg,scrawl/osg,openscenegraph/osg,openscenegraph/osg,scrawl/osg,artoolkit/osg,jtorresfabra/osg,openscenegraph/osg,jtorresfabra/osg,openscenegraph/osg,marchelbling/osg,artoolkit/osg,marchelbling/osg