don't fail at uninstall if we don't find the key

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@12860 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/BusinessTemplate.py

@@ -1887,10 +1887,12 @@ class CatalogMethodTemplateItem(ObjectTemplateItem):
       else:
         values = self._archive.values()
     else:
+      try:
         value = self._archive[object_path]
+      except KeyError:
+        value = None
       if value is not None:
         values.append(value)
-
     for obj in values:
       method_id = obj.id
       # remove method references in portal_catalog