matching works fine without any matcher if there is only one prevision movement.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@33401 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/mixin/movement_collection_updater.py

@@ -72,7 +72,7 @@ class MovementCollectionUpdaterMixin:
 
     # Get divergence testers
     tester_list = self._getMatchingTesterList()
-    if len(tester_list) == 0:
+    if len(tester_list) == 0 and len(prevision_movement_list) > 2:
       raise ValueError("It is not possible to match movements without divergence testers")
 
     # Create small groups of movements per hash keys