From Bob Kuehne, build fix for OSX 10.7 SDK.
From Bob Kuehne, build fix for OSX 10.7 SDK.


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