Small kwargs fix

Author: ericholscher

readthedocs/core/utils/__init__.py

@@ -28,6 +28,8 @@
 
 def broadcast(type, task, args, kwargs=None):  # pylint: disable=redefined-builtin
     assert type in ['web', 'app', 'build']
+    if kwargs is None:
+        kwargs = {}
     default_queue = getattr(settings, 'CELERY_DEFAULT_QUEUE', 'celery')
     if type in ['web', 'app']:
         servers = getattr(settings, "MULTIPLE_APP_SERVERS", [default_queue])