From Piotr Rak, "added bool conversion for ref_ptr, when no implicit conversion  to T* is used."
From Piotr Rak, "added bool conversion for ref_ptr, when no implicit conversion  to T* is used."


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