From 54d4bf413ee813638c90b426907ca5c2b3c85720 Mon Sep 17 00:00:00 2001
From: csn-openerp <csn@openerp.com>
Date: Thu, 7 Feb 2013 09:41:29 +0100
Subject: [PATCH] [FIX]sale : traceback in product_id_change, cannot
 concatenate string and dict object

bzr revid: csn@openerp.com-20130207084129-6duxkp96svudaj4n
---
 addons/sale/sale.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/addons/sale/sale.py b/addons/sale/sale.py
index cddde4a5f08..8e944691a1d 100644
--- a/addons/sale/sale.py
+++ b/addons/sale/sale.py
@@ -880,7 +880,7 @@ class sale_order_line(osv.osv):
             date_order = time.strftime(DEFAULT_SERVER_DATE_FORMAT)
 
         result = {}
-        warning_msgs = {}
+        warning_msgs = ''
         product_obj = product_obj.browse(cr, uid, product, context=context_partner)
 
         uom2 = False