erp5_trade: it can return Unauthorized

why ?

bt5/erp5_trade/SkinTemplateItem/portal_skins/erp5_trade/InventoryReport_recordProductStock.py

+from zExceptions import Unauthorized
+
 portal = context.getPortalObject()
 getCurrentInventoryList = portal.portal_simulation.getCurrentInventoryList
 newContent = context.newContent
@@ -24,6 +26,11 @@ inventory_list = getCurrentInventoryList(**kw)
 line_tag = '%s:lineUpdateTotalAssetPrice' % relative_url
 #only after all calculation are finished then change report state
 for inventory in inventory_list:
+  #XXXXXXXXXXXXXXXXXX
+  try:
+    inventory.getResource()
+  except Unauthorized:
+    continue
   inventory_report_line = newContent(portal_type='Inventory Report Line')
   inventory_report_line.edit(
     resource = inventory.getResource(),