[FIX] mass_mailing: model declaration order

mail.mass_mailing.contact needs the model mail.mass_mailing.list
to be defined before itself, as some fields
need this model.

opw-643482

addons/mass_mailing/models/mass_mailing.py

@@ -24,6 +24,28 @@ class MassMailingCategory(osv.Model):
     }
 
 
+class MassMailingList(osv.Model):
+    """Model of a contact list. """
+    _name = 'mail.mass_mailing.list'
+    _order = 'name'
+    _description = 'Mailing List'
+
+    def _get_contact_nbr(self, cr, uid, ids, name, arg, context=None):
+        result = dict.fromkeys(ids, 0)
+        Contacts = self.pool.get('mail.mass_mailing.contact')
+        for group in Contacts.read_group(cr, uid, [('list_id', 'in', ids), ('opt_out', '!=', True)], ['list_id'], ['list_id'], context=context):
+            result[group['list_id'][0]] = group['list_id_count']
+        return result
+
+    _columns = {
+        'name': fields.char('Mailing List', required=True),
+        'contact_nbr': fields.function(
+            _get_contact_nbr, type='integer',
+            string='Number of Contacts',
+        ),
+    }
+
+
 class MassMailingContact(osv.Model):
     """Model of a contact. This model is different from the partner model
     because it holds only some basic information: name, email. The purpose is to
@@ -79,28 +101,6 @@ class MassMailingContact(osv.Model):
         return res
 
 
-class MassMailingList(osv.Model):
-    """Model of a contact list. """
-    _name = 'mail.mass_mailing.list'
-    _order = 'name'
-    _description = 'Mailing List'
-
-    def _get_contact_nbr(self, cr, uid, ids, name, arg, context=None):
-        result = dict.fromkeys(ids, 0)
-        Contacts = self.pool.get('mail.mass_mailing.contact')
-        for group in Contacts.read_group(cr, uid, [('list_id', 'in', ids), ('opt_out', '!=', True)], ['list_id'], ['list_id'], context=context):
-            result[group['list_id'][0]] = group['list_id_count']
-        return result
-
-    _columns = {
-        'name': fields.char('Mailing List', required=True),
-        'contact_nbr': fields.function(
-            _get_contact_nbr, type='integer',
-            string='Number of Contacts',
-        ),
-    }
-
-
 class MassMailingStage(osv.Model):
     """Stage for mass mailing campaigns. """
     _name = 'mail.mass_mailing.stage'