From Marco Jez, fix for gcc build.
From Marco Jez, fix for gcc build.


XiaoCC/osg,omega-hub/osg,ntoand/osg,artoolkit/osg,ntoand/osg,koshman86/osg,stmh/osg,XiaoCC/osg,ghub/osg,ghub/osg,stmh/osg,omega-hub/osg,koshman86/osg,ntoand/osg,artoolkit/osg,stmh/osg,artoolkit/osg,koshman86/osg,stmh/osg,omega-hub/osg,ghub/osg,XiaoCC/osg,artoolkit/osg,omega-hub/osg,koshman86/osg,ghub/osg,ntoand/osg,XiaoCC/osg,XiaoCC/osg,stmh/osg