[fix] Discard packets when socket is closed (#469)

Author: konstantinzolotarev

lib/socket.js

@@ -379,7 +379,7 @@ Socket.prototype.sendPacket = function (type, data, options, callback) {
   options = options || {};
   options.compress = false !== options.compress;
 
-  if ('closing' !== this.readyState) {
+  if ('closing' !== this.readyState && 'closed' !== this.readyState) {
     debug('sending packet "%s" (%s)', type, data);
 
     var packet = {