dgram: calculate bind address without arguments

Author: cjihrig

lib/dgram.js

@@ -131,7 +131,7 @@ function replaceHandle(self, newHandle) {
   self._handle = newHandle;
 }
 
-Socket.prototype.bind = function(port_ /*, address, callback*/) {
+Socket.prototype.bind = function(port_, address_ /*, callback*/) {
   var self = this;
   let port = port_;
 
@@ -159,7 +159,7 @@ Socket.prototype.bind = function(port_ /*, address, callback*/) {
     exclusive = !!port.exclusive;
     port = port.port;
   } else {
-    address = typeof arguments[1] === 'function' ? '' : arguments[1];
+    address = typeof address_ === 'function' ? '' : address_;
     exclusive = false;
   }