From 3deb941a5434a35a8ba81b6cee006677d9d566dc Mon Sep 17 00:00:00 2001
From: Bob Halley <halley@dnspython.org>
Date: Sat, 1 May 2021 14:19:16 -0700
Subject: If a message handler returned None, do not yield it to the caller.

This is a bit cleaner than yielding it and having the caller throw an
exception trying to treat it as a message.
---
 tests/nanonameserver.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/nanonameserver.py b/tests/nanonameserver.py
index 18ba6c5..5c9a9c7 100644
--- a/tests/nanonameserver.py
+++ b/tests/nanonameserver.py
@@ -237,7 +237,7 @@ class Server(threading.Thread):
                 out = thing.to_wire(self.origin, multi=multi, tsig_ctx=tsig_ctx)
                 tsig_ctx = thing.tsig_ctx
                 yield out
-            else:
+            elif thing is not None:
                 yield thing
 
     async def serve_udp(self):
-- 
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