Bug fix: correct a division by zero.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@3225 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/DeliveryBuilder.py

@@ -515,6 +515,7 @@ class DeliveryBuilder(XMLObject, Amount, Predicate):
           quantity = simulation_movement.getQuantity()
           simulation_movement.setDeliveryRatio(quantity/total_quantity)
       else:
+        if len(sim_mvt_list) != 0:
           # Distribute equally ratio to all movement
           mvt_ratio = 1 / len(sim_mvt_list)
           for simulation_movement in sim_mvt_list: