dgram: hook up handle wrap to owning object

lib/dgram.js

@@ -91,7 +91,7 @@ function Socket(type, listener) {
   events.EventEmitter.call(this);
 
   var handle = newHandle(type);
-  handle.socket = this;
+  handle.owner = this;
 
   this._handle = handle;
   this._receiving = false;
@@ -200,7 +200,7 @@ Socket.prototype.send = function(buffer,
 
 
 function afterSend(status, handle, req, buffer) {
-  var self = handle.socket;
+  var self = handle.owner;
 
   // CHECKME socket's been closed by user, don't call callback?
   if (handle !== self._handle)
@@ -344,7 +344,7 @@ Socket.prototype._stopReceiving = function() {
 
 
 function onMessage(handle, slab, start, len, rinfo) {
-  var self = handle.socket;
+  var self = handle.owner;
   if (!slab) return self.emit('error', errnoException(errno, 'recvmsg'));
   rinfo.size = len; // compatibility
   self.emit('message', slab.slice(start, start + len), rinfo);