mail: add 1.8 compat to feed_mail management command

welco/sources/mail/management/commands/feed_mail.py

@@ -22,6 +22,8 @@ from django.core.management.base import BaseCommand, CommandError
 from ...models import Mail
 
 class Command(BaseCommand):
+    args = ['...']
+
     def handle(self, *args, **kwargs):
         count = 0
         for filepath in args: