Note that getCellRange can return None.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@3091 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/DeliveryLine.py

@@ -156,7 +156,8 @@ class DeliveryLine(Movement, XMLObject, XMLMatrix, Variated):
       # But, getVariationText of the line was not empty.
       # So, in ZODB, resource as without variation, but in catalog, this was
       # the contrary...
-      return int(XMLMatrix.getCellRange(self, base_id=base_id) != [])
+      cell_range = XMLMatrix.getCellRange(self, base_id=base_id)
+      return (cell_range is not None and len(cell_range) > 0)
 
     security.declareProtected( Permissions.AccessContentsInformation, 'getCellValueList' )
     def getCellValueList(self, base_id='movement'):