Prevent infinite loop to make sure.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@25503 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_trade/SkinTemplateItem/portal_skins/erp5_trade/OpenSaleOrderLine_getPeriodicityLineValueList.xml

@@ -61,6 +61,8 @@
 def iterate(trade_condition, trade_condition_list):\n
   if trade_condition is None:\n
     return\n
+  elif trade_condition in trade_condition_list:\n
+    return\n
   else:\n
     trade_condition_list.append(trade_condition)\n
     for next_trade_condition in trade_condition.getSpecialiseValueList():\n

bt5/erp5_trade/bt/revision

-590
\ No newline at end of file
+591
\ No newline at end of file