fix

nonfree/controller/CentralDB.cpp

@@ -1442,7 +1442,7 @@ void CentralDB::onlineNotificationThread()
 				std::string memberId(memTmp);
 
 				try {
-					pqxx::row r = w2.exec_params1(
+					pqxx::row r = w.exec_params1(
 						"SELECT device_id, network_id FROM network_memberships_ctl WHERE network_id = $1 AND device_id "
 						"= $2",
 						networkId, memberId);