Fix TypeError: cb is not a function during ping

core/servers/login/websocket.js

@@ -189,7 +189,7 @@ exports.getModule = class WebSocketLoginServer extends LoginServerModule {
 						ws.isConnectionAlive = false;	//	pong will reset this
 
 						Log.trace('Ping to remote WebSocket client');
-						return ws.ping('', false, true);
+						return ws.ping('', false);	//	false=don't mask
 					});
 				}
 			});