net_uv: Fix server.listen argument parsing

lib/net_uv.js

@@ -399,7 +399,13 @@ function toPort(x) { return (x = Number(x)) >= 0 ? x : false; }
 
 
 function listenip(self, ip, port) {
-  var r = self._handle.bind(ip, port);
+  var r = 0;
+
+  if (ip && port) {
+    debug("bind to " + ip);
+    r = self._handle.bind(ip, port);
+  }
+
   if (r) {
     self.emit('error', errnoException(errno, 'listen'));
   } else {
@@ -423,12 +429,10 @@ Server.prototype.listen = function() {
   if (arguments.length == 0 || typeof arguments[0] == 'function') {
     // Don't bind(). OS will assign a port with INADDR_ANY.
     // The port can be found with server.address()
-    this._handle.listen(self._backlog || 128);
-    process.nextTick(function() {
-      self.emit('listening');
-    });
+    listenip(self, null, null);
 
-  } else if (typeof arguments[1] == 'undefined') {
+  } else if (typeof arguments[1] == 'undefined' ||
+             typeof arguments[1] == 'function') {
     // The first argument is the port, no IP given.
     listenip(self, '0.0.0.0', port);