fix check twig var defined

templates/themes/kohinos/block/operations.html.twig

@@ -18,7 +18,7 @@
                     <th scope="col">Operation</th>
                     <th scope="col">Montant</th>
                     {# Display column to store btn to cancel transaction adherent prestataire #}
-                    {% if display_cancel_transaction_btn %}
+                    {% if display_cancel_transaction_btn is defined and display_cancel_transaction_btn %}
                         <th scope="col"></th>
                     {% endif %}
                   </tr>
@@ -61,7 +61,7 @@
                         </td>
                         <td><span class='font-weight-bold {{ (operation.montant < 0)? '':'text-primary' }}'>{{ (operation.montant < 0)? '- ':'+ ' }} {{ operation.montant|abs|number_format(2) }} {{ getCurrencyName(operation.currency) }}</span></td>
                         {# Display btn to cancel transaction adherent prestataire #}
-                        {% if display_cancel_transaction_btn
+                        {% if display_cancel_transaction_btn is defined and display_cancel_transaction_btn
                             and operation.flux.type is same as(constant('App\\Entity\\Transaction::TYPE_TRANSACTION_ADHERENT_PRESTATAIRE'))
                             and app.user in operation.flux.destinataire.users %}
                             <td class='text-right'>