title: <c:if> tag for JSF page
body: <p>Used to develop Portlets and JPS's, so have a dilemma.</p>
  
  <p>task: display <code>&lt;h:dataTable&gt;</code> only when list isn't empty</p>
  
  <p>Is it possible to provide <code>&lt;c:if&gt;</code> tag for JSF page?</p>