Added an osg::absolute template function into osg/Math.
Added an osg::absolute template function into osg/Math.


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