[FIX] project: project duplicate message followers

This is related to revision
c8aac116a6

`message_follower_ids` is a one2many field
on the thread. To copy them, you must
create new `mail.followers` records, and not
linking the followers of the project
being duplicated to the duplicated project.

addons/project/project.py

@@ -255,8 +255,9 @@ class project(osv.osv):
         proj = self.browse(cr, uid, id, context=context)
         if not default.get('name'):
             default.update(name=_("%s (copy)") % (proj.name))
-        default['message_follower_ids'] = [(6, 0, proj.message_follower_ids.ids)]
         res = super(project, self).copy(cr, uid, id, default, context)
+        for follower in proj.message_follower_ids:
+            self.message_subscribe(cr, uid, res, partner_ids=[follower.partner_id.id], subtype_ids=[subtype.id for subtype in follower.subtype_ids])
         self.map_tasks(cr, uid, id, res, context=context)
         return res