From Laurens Voerman, "I hit a bug when making a copy of a PagedLOD node, the copy has lost it's _databasePath and can no longer load it's childen. " 
From Laurens Voerman, "I hit a bug when making a copy of a PagedLOD node, the copy has lost
it's _databasePath and can no longer load it's childen. " 

Added _databasePath(plod._databasePath), in the copy copy construcutor.




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