[IMP] name_get of product should not ask for seller_ids if not necessary

bzr revid: jco@openerp.com-20140227160808-m53f0kkgbqno1ea8

addons/product/product.py

@@ -807,7 +807,10 @@ class product_product(osv.osv):
 
         result = []
         for product in self.browse(cr, SUPERUSER_ID, ids, context=context):
-            sellers = filter(lambda x: x.name.id == partner_id, product.seller_ids)
+            if partner_id:
+                sellers = filter(lambda x: x.name.id == partner_id, product.seller_ids)
+            else:
+                sellers = False
             if sellers:
                 for s in sellers:
                     mydict = {

addons/stock_megatest/test/megatestmtobuy.yml

@@ -1,8 +1,3 @@
--
-  Do it with the rights of Mr. Demo
--
-  !context
-    uid: 'base.user_demo'
 -
   I first create a warehouse with pick-pack-ship and reception in 2 steps
 -