title: Symfony 2 Radio Button Boolean Issue?
body: <p>ok, I am running with symfony 2.7.8. I have a User Abstract form which I added an 'active' state option which seems to work, as in it aloows me to set the user active/non-active if I wish. </p>
  
  <p>However, when the user is set to Non-Active (0) it does not check that radio option. It will default to checked if the user is Active (1). Am I just doing something wrong or what?</p>
  
  <p>Active 'Add' section</p>
  
  <pre><code>  $ActiveState = [0 =&gt; 'Non-Active', 1 =&gt; 'Active'];
  
    -&gt;add('active', 'choice', [
                              'label' =&gt; 'Active State',
                              'multiple' =&gt; false,
                              'choices' =&gt; $ActiveState, 
                              'expanded' =&gt; true,
                              'label_attr' =&gt; ['class' =&gt;'Active']
                              ])
  </code></pre>
  
  <p>And this is how I build the form for loading a user</p>
  
  <pre><code>   $User = $this-&gt;getDoctrine()
                      -&gt;getRepository('XXXXBundle:Users')
                      -&gt;find($id); &lt;- If i passed in url e.g. /user/ID-HERE
  
     $EditUser = $this-&gt;createForm(new UserType(),$User,[
                                  'action' =&gt; $this-&gt;generateUrl('UserUpdate',['id' =&gt; $id]),
                                  'method' =&gt; 'PUT'
                                  ]);
  </code></pre>
  
  <p>When I select either of the Radio buttons it will update that user, but only have an Active User pre-checked? </p>
  
  <p>So what am I doing wrong?</p>
  
  <p>All help most welcome, ps. if someone wants me to post all of the controller function or the User Form, then please let me know.</p>
  
  <p>Thanks.</p>