Prevent making root applied rule which may not be needed.

getSimulationQuantity can return None. Before this fix,
since getSimulationQuantity returns None, an empty line
can trigger to generate root applied rule,


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@38926 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Delivery.py

@@ -338,7 +338,7 @@ class Delivery(XMLObject, ImmobilisationDelivery, CompositionMixin):
         if not m.isSimulated():
           #LOG('Delivery.isSimulated m.getQuantity',0,m.getQuantity())
           #LOG('Delivery.isSimulated m.getSimulationQuantity',0,m.getSimulationQuantity())
-          if m.getQuantity() != 0.0 or m.getSimulationQuantity() != 0:
+          if m.getQuantity() != 0.0 or m.getSimulationQuantity() not in (0, None):
             return 0
           # else Do we need to create a simulation movement ? XXX probably not
       return 1