Added #include<memory> to fix gcc 4.3 build problem
Added #include<memory> to fix gcc 4.3 build problem


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