fixed Date comparison problem in isDivergent

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@111 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Delivery.py

@@ -499,6 +499,9 @@ une liste de mouvements..."""
         emit targetUnreachable !
       """
       from DateTime import DateTime
+      if self.getStartDate() is None or self.getTargetStartDate() is None \
+               or self.getStopDate() is None or self.getTargetStopDate() is None:
+        return 1
       # This is uggly but required due to python2.2/2.3 Zope 2.6/2.7 inconsistency in _millis calculation
       if self.getStartDate().Date() != self.getTargetStartDate().Date()  or \
          self.getStopDate().Date() != self.getTargetStopDate().Date():

product/ERP5/Document/Movement.py

@@ -382,6 +382,9 @@ a service in a public administration)."""
 
       emit targetUnreachable !
     """
+    if self.getStartDate() is None or self.getTargetStartDate() is None \
+            or self.getStopDate() is None or self.getTargetStopDate() is None:
+      return 1
     # This is uggly but required due to python2.2/2.3 Zope 2.6/2.7 inconsistency in _millis calculation
     return self.getQuantity() != self.getTargetQuantity() or \
            self.getStartDate().Date() != self.getTargetStartDate().Date() or \