Fix getElementaryType()

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@42240 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Core/StandardProperty.py

@@ -79,7 +79,7 @@ class StandardProperty(XMLObject):
       if category.startswith('elementary_type/'):
         return category.split('elementary_type/')[1]
 
-    return None
+    return getattr(self, 'elementary_type', None)
 
   getStorageId = BaseGetter('getStorageId', 'storage_id', 'string')