Fixed missinged intialization of the _threadsRunning variable.
Fixed missinged intialization of the _threadsRunning variable.


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