title: Wordpress: force wp_tag_cloud to display empty categories?
body: <p>I'm using <code>wp_tag_cloud()</code> to display the categories in my custom taxonomy:</p>
  <pre><code>$args = array
  (
      'format'                    =&gt; 'list',
      'orderby'                   =&gt; 'name', 
      'order'                     =&gt; 'ASC',
      'topic_count_text_callback' =&gt; default_topic_count_text,
      'link'                      =&gt; 'view', 
      'taxonomy'                  =&gt; 'my_tax', 
      'echo'                      =&gt; true 
  );
      
  wp_tag_cloud( $args );
  </code></pre>
  <p>The problem is that only categories with posts are displayed, so instead of seeing 40+ categories I only see 3.</p>
  <p><strong>Is there a way to force wp_tag_cloud to display all categories?</strong></p>