From Lilin Xiong, added missing OSG_EXPORT
From Lilin Xiong, added missing OSG_EXPORT


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