[damned-lies] Ensure update-trans has proper working dir

[Claude Paroz <claudep src gnome org>]

commit 39dd86ff4764107de1e3dd41457a24030b80cdad
Author: Claude Paroz <claude 2xlibre net>
Date:   Tue Sep 17 13:21:48 2019 +0200

    Ensure update-trans has proper working dir

 stats/management/commands/update-trans.py | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/stats/management/commands/update-trans.py b/stats/management/commands/update-trans.py
index 9c6667db..43f3a248 100644
--- a/stats/management/commands/update-trans.py
+++ b/stats/management/commands/update-trans.py
@@ -3,6 +3,7 @@ import re
 import shutil
 import itertools
 
+from django.conf import settings
 from django.core.management import call_command
 from django.core.management.base import BaseCommand
 from django.db.models import F
@@ -21,6 +22,7 @@ class Command(BaseCommand):
         #        help="create a pot file"),
 
     def handle(self, **options):
+        os.chdir(settings.BASE_DIR)
         lang_code = options['lang_code']
 
         # Copy po/ll.po in locale/ll/LC_MESSAGES/django.po