From a06af6f5573ea413f4ac349c70863258bcbe1dfa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicolas=20=C3=89vrard?= <nicoe@b2ck.com>
Date: Fri, 21 Sep 2012 16:03:48 +0200
Subject: [PATCH] use None instead of False as default value

review351003
---
 trytond/model/model.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/trytond/model/model.py b/trytond/model/model.py
index f5d245299a..c28a923f4b 100644
--- a/trytond/model/model.py
+++ b/trytond/model/model.py
@@ -396,7 +396,7 @@ class Model(WarningErrorMixin, URLMixin):
                 if self._columns[field].on_change:
                     args = {}
                     for arg in self._columns[field].on_change:
-                        args[arg] = value.get(arg, False)
+                        args[arg] = value.get(arg, None)
                         if arg in self._columns \
                                 and self._columns[arg]._type == 'many2one':
                             if isinstance(args[arg], (list, tuple)):