BUG FIX when no portal_type is selected (portal_type_filter is None, not [])

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@4206 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/dtml/interaction_properties.dtml

@@ -27,14 +27,14 @@
 <dtml-in "portal_types.objectIds()" sort>
  <dtml-if expr="aq_parent.aq_parent.id in portal_workflow._chains_by_type.get(_['sequence-item'], [])">
   <dtml-if portal_type_filter>
-   <dtml-let selected="_['sequence-item'] in portal_type_filter and 'selected' or ' '">
+   <dtml-let selected="_['sequence-item'] in (portal_type_filter or []) and 'selected' or ' '">
     <option value="&dtml-sequence-item;" &dtml-selected;>&dtml-sequence-item;</option>
    </dtml-let>
   <dtml-else>
    <option value="&dtml-sequence-item;">&dtml-sequence-item;</option>
   </dtml-if>
   <dtml-else>
-   <dtml-if expr="_['sequence-item'] in portal_type_filter">
+   <dtml-if expr="_['sequence-item'] in (portal_type_filter or [])">
     <option value="&dtml-sequence-item;" selected>(???) &dtml-sequence-item;</option>
    </dtml-if>
  </dtml-if>