[IMP] project_scrum: inhetrit from mail.thread

bzr revid: tpa@tinyerp.com-20120507120323-dq39n179r8swiol2

addons/project_scrum/project_scrum.py

@@ -44,6 +44,7 @@ class project_scrum_sprint(osv.osv):
     _name = 'project.scrum.sprint'
     _description = 'Project Scrum Sprint'
     _order = 'date_start desc'
+    _inherit = ['mail.thread']
     def _compute(self, cr, uid, ids, fields, arg, context=None):
         res = {}.fromkeys(ids, 0.0)
         progress = {}

addons/project_scrum/wizard/project_scrum_backlog_sprint.py

@@ -24,6 +24,7 @@ from tools.translate import _
 class backlog_sprint_assign(osv.osv_memory):
     _name = 'project.scrum.backlog.assign.sprint'
     _description = 'Assign sprint to backlogs'
+    _inherit = ['mail.thread']
     _columns = {
         'sprint_id': fields.many2one('project.scrum.sprint', 'Sprint', required=True, help="Select Sprint to assign backlog."),
         'state_open': fields.boolean('Open Backlog', help="Change the state of product backlogs to open if its in draft state"),