Embed view with a wildcard argument

I'm trying to embed a view on a node with the following code:

<?php
  $view_args = array('all',1);
  $display_id = 'page';
  $view = views_get_view('news');
       if (!empty($view)) {
        print $view->execute_display($display_id, $view_args);
  }
?>

The first argument ('all') is the wildcard I've selected in my view configuration. When this code runs, I get my empty message. I've tried passing an empty string, NULL and false, and I still get the empty message. How do I pass a wildcard as my first argument?

Thanks.