Since MappedValue does not inherit Amount now, Path has to inherit

Amount. Otherwise child class of Path(Supply Cell for example) cannot
handle variation.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@41509 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Path.py

@@ -31,8 +31,10 @@ from AccessControl import ClassSecurityInfo
 from Products.ERP5Type import Permissions, PropertySheet
 
 from Products.ERP5.Document.MappedValue import MappedValue
+from Products.ERP5.Document.Amount import Amount
 
-class Path(MappedValue):
+
+class Path(MappedValue, Amount):
   """
     A Path defines a planning element. A path is the combination of