[FIX] mass_mailing: translated stage in kanban view

Missing _ in read_group call

addons/mass_mailing/i18n/mass_mailing.pot

@@ -6,8 +6,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Odoo Server 9.0c\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-01-06 07:17+0000\n"
-"PO-Revision-Date: 2016-01-06 07:17+0000\n"
+"POT-Creation-Date: 2016-01-13 15:46+0000\n"
+"PO-Revision-Date: 2016-01-13 15:46+0000\n"
 "Last-Translator: <>\n"
 "Language-Team: \n"
 "MIME-Version: 1.0\n"
@@ -523,8 +523,10 @@ msgid "Domain"
 msgstr ""
 
 #. module: mass_mailing
+#: code:addons/mass_mailing/models/mass_mailing.py:638
 #: selection:mail.mass_mailing,state:0
 #: selection:mail.statistics.report,state:0
+#, python-format
 msgid "Draft"
 msgstr ""
 
@@ -702,7 +704,9 @@ msgid "If checked, recipients will be mailed only once, allowing to sendvarious
 msgstr ""
 
 #. module: mass_mailing
+#: code:addons/mass_mailing/models/mass_mailing.py:638
 #: selection:mail.mass_mailing,state:0
+#, python-format
 msgid "In Queue"
 msgstr ""
 
@@ -1356,11 +1360,14 @@ msgid "Send to All"
 msgstr ""
 
 #. module: mass_mailing
+#: code:addons/mass_mailing/models/mass_mailing.py:638
 #: selection:mail.mass_mailing,state:0
+#, python-format
 msgid "Sending"
 msgstr ""
 
 #. module: mass_mailing
+#: code:addons/mass_mailing/models/mass_mailing.py:638
 #: model:ir.model.fields,field_description:mass_mailing.field_mail_mail_statistics_sent
 #: model:ir.model.fields,field_description:mass_mailing.field_mail_mass_mailing_sent
 #: model:ir.model.fields,field_description:mass_mailing.field_mail_statistics_report_sent
@@ -1368,6 +1375,7 @@ msgstr ""
 #: selection:mail.mass_mailing,state:0
 #: model:mail.mass_mailing.stage,name:mass_mailing.campaign_stage_3
 #: selection:mail.statistics.report,state:0
+#, python-format
 msgid "Sent"
 msgstr ""
 

addons/mass_mailing/models/mass_mailing.py

@@ -635,7 +635,7 @@ class MassMailing(osv.Model):
         if groupby and groupby[0] == "state":
             # Default result structure
             # states = self._get_state_list(cr, uid, context=context)
-            states = [('draft', 'Draft'), ('in_queue', 'In Queue'), ('sending', 'Sending'), ('done', 'Sent')]
+            states = [('draft', _('Draft')), ('in_queue', _('In Queue')), ('sending', _('Sending')), ('done', _('Sent'))]
             read_group_all_states = [{
                 '__context': {'group_by': groupby[1:]},
                 '__domain': domain + [('state', '=', state_value)],