Make getLocaleFromRegistryCache reload existing locales.

The core locale is loaded before this function is called, so it needs to
reload it for non-en locales to be loaded.

src/i18n.py

@@ -61,6 +61,8 @@ def getLocaleFromRegistryCache():
         currentLocale = registry._cache['supybot.language']
     except KeyError:
         pass
+    else:
+        reloadLocales()
 
 def import_conf():
     """Imports the conf into this module"""