Previous optimization was too much. Now using standard accessors instead.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@19553 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_accounting/SkinTemplateItem/portal_skins/erp5_accounting/AccountingTransactionModule_viewAccountingTransactionList/listbox_operation_date.xml

@@ -492,7 +492,7 @@
       <dictionary>
         <item>
             <key> <string>_text</string> </key>
-            <value> <string>python:(cell.section_mark==\'source\' and getattr(cell.getObject(), \'start_date\', None)) or getattr(cell.getObject(), \'stop_date\', None)</string> </value>
+            <value> <string>python:(cell.section_mark==\'source\' and cell.getStartDate()) or cell.getStopDate()</string> </value>
         </item>
       </dictionary>
     </pickle>