From fc02ea9f674e44d99eb12528fceaed64a950bbed Mon Sep 17 00:00:00 2001
From: Tim Abbott <tabbott@mit.edu>
Date: Mon, 25 Jan 2016 14:35:35 -0800
Subject: [PATCH] do_add_default_stream: Fix return value if stream exists.

Discovered using mypy static type checker.
---
 zerver/lib/actions.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zerver/lib/actions.py b/zerver/lib/actions.py
index 0730cb4c61..8a6aa8cd5f 100644
--- a/zerver/lib/actions.py
+++ b/zerver/lib/actions.py
@@ -1878,7 +1878,7 @@ def set_default_streams(realm, stream_names):
 def do_add_default_stream(realm, stream_name):
     stream, _ = create_stream_if_needed(realm, stream_name)
     if DefaultStream.objects.filter(realm=realm, stream=stream).exists():
-        return
+        return {}
     DefaultStream.objects.create(realm=realm, stream=stream)
     return {}