Layout : ajout d'un block pour pouvoir ajouter des scripts javascript

ShopBundle/Resources/views/backend/default/layout.html.twig

@@ -227,7 +227,7 @@
         <script src="{{ asset('bundles/lcshop/js/backend/script/default/init-common.js') }}"></script>
     {% endblock script_javascript %}
 
-
+    {% block add_script_javascript %}{% endblock add_script_javascript %}
     </body>
 {% endblock body %}
 </html>