title: InputText binded to a null double filed present "0.0"
body: <p>Is there a way to prevent this without creating a new converter?</p>
  
  <pre><code>&lt;p:inputText value="#{myMB.myDouble}" /&gt;
  
  @ManagedBean
  @SessionScoped
  public class MyMB
      private Double myDouble = null;
  ....
  </code></pre>
  
  <p>When i enter to the view i want to see the empty input field, not with "0.0".</p>