Bugfix: in some cases, there is a country cache but no region cache

Author: jpic

cities_light/management/commands/cities_light.py

@@ -144,6 +144,7 @@ def handle(self, *args, **options):
                         # free some memory
                         if getattr(self, '_country_codes', False):
                             del self._country_codes
+                        if getattr(self, '_region_codes', False):
                             del self._region_codes
                         self.translation_parse(items)