don't call catalogObjectList with an empty stock_object_list

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@42335 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/BalanceTransaction.py

@@ -477,9 +477,10 @@ class BalanceTransaction(AccountingTransaction, Inventory):
     self.portal_catalog.catalogObjectList([self])
     
     # Catalog differences calculated from lines
-    self.portal_catalog.catalogObjectList(stock_object_list[::],
-         method_id_list=('z_catalog_stock_list',),
-         disable_cache=1, check_uid=0,
-         sql_catalog_id=sql_catalog_id,
-         disable_archive=disable_archive,
-         immediate_reindex_archive=immediate_reindex_archive)
+    if stock_object_list:
+      self.portal_catalog.catalogObjectList(stock_object_list[::],
+           method_id_list=('z_catalog_stock_list',),
+           disable_cache=1, check_uid=0,
+           sql_catalog_id=sql_catalog_id,
+           disable_archive=disable_archive,
+           immediate_reindex_archive=immediate_reindex_archive)