use state group family instead of hardcoding

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@17797 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Inventory.py

@@ -97,7 +97,7 @@ class Inventory(Delivery):
     to have our own temp object constructor, this is usefull if we
     want to use some classes with some particular methods
     """
-    if self.getSimulationState() != "delivered":
+    if self.getSimulationState() in self.getPortalDraftOrderStateList():
       # this prevent from trying to calculate stock
       # with not all properties defined and thus making
       # request with no condition in mysql