refactor: Code improvments

lib/client.js

@@ -51,16 +51,7 @@ function Client (broker, conn, req) {
   // queue packets received before client fires 'connect' event. Prevents memory leaks on 'connect' event
   this.parser._queue = []
 
-  this.on('connected', dequeue)
-
-  function dequeue () {
-    var q = this.parser._queue
-    for (var i = 0, len = q.length; i < len; i++) {
-      handle(this, q[i], this._nextBatch)
-    }
-
-    this.parser._queue = null
-  }
+  this.once('connected', dequeue)
 
   this.parser.on('packet', enqueue)
 
@@ -348,4 +339,13 @@ function enqueue (packet) {
   }
 }
 
+function dequeue () {
+  var q = this.parser._queue
+  for (var i = 0, len = q.length; i < len; i++) {
+    handle(this, q[i], this._nextBatch)
+  }
+
+  this.parser._queue = null
+}
+
 function nop () { }