[TIMOB-126] HTTPClient status appears to be incorrect

When I try to check this.status (or this.getStatus()) from within a onreadystatechange function, I always seem to get 0, although I believe that I should be getting either 200 or 401. Consider the following example using the twitter API:

$('#login').click(function()

{
  notify("Login Clicked");
  var query = "twitter.com/account/verify_credentials.json";
  var xhr = Titanium.Network.createHTTPClient();
  xhr.onreadystatechange = function(){
    if (this.readyState == 4 )
    {
      notify("Status: "+this.status);
    }
  };
  xhr.open('GET',
    "http://"+$('#username').val()+":"+$('#password').val()+"@"+query);
  xhr.send();
});

Based on the HTTPClient documentation, I'd expect to get either 200 or 401 for a status, depending on whether the authentication was successful. Judging from the JSON response, I can tell that I authenticate correctly or incorrectly for a given username or password, but the status code does not seem to reflect what twitter returns.

Thanks.