From 16fd15965ca4a9a2986f60a7301e86ecb06eb6e3 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sun, 15 Jan 2017 18:41:34 +0100
Subject: [PATCH] block size of 0 is also valid

---
 src/dht/plugin_block_dht.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/dht/plugin_block_dht.c b/src/dht/plugin_block_dht.c
index 4256a0fe6..8bb533961 100644
--- a/src/dht/plugin_block_dht.c
+++ b/src/dht/plugin_block_dht.c
@@ -75,7 +75,8 @@ block_plugin_dht_evaluate (void *cls,
     GNUNET_break_op (0);
     return GNUNET_BLOCK_EVALUATION_REQUEST_INVALID;
   }
-  if (NULL == reply_block)
+  if ( (NULL == reply_block) ||
+       (0 == reply_block_size) )
     return GNUNET_BLOCK_EVALUATION_REQUEST_VALID;
   if (reply_block_size < sizeof (struct GNUNET_MessageHeader))
   {
-- 
2.25.1