Fix form template regression

Resources/views/Form/silex_form_div_layout.html.twig

@@ -78,7 +78,7 @@
 {% block form_errors %}
 {% spaceless %}
     {% if errors|length > 0 %}
-        {% if not form.hasParent  or 'repeated' in form.get('types') %}
+        {% if not form.parent  or 'repeated' in form.vars['block_prefixes'] %}
             <div class="control-group error">
         {% endif %}
         <span class="help-inline">
@@ -88,7 +88,7 @@
                 {% endif %}
             {% endfor %}
         </span>
-        {% if not form.hasParent  or 'repeated' in form.get('types') %}
+        {% if not form.parent  or 'repeated' in form.vars['block_prefixes'] %}
             </div>
         {% endif %}
     {% endif %}