From 869b3a7feb1e130a374540526f24107ded7fb1f9 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sun, 8 Jan 2017 20:09:59 +0100
Subject: [PATCH] fix potential NPE

---
 src/nat/nat_api.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/nat/nat_api.c b/src/nat/nat_api.c
index 826dbd57a..5b4c39682 100644
--- a/src/nat/nat_api.c
+++ b/src/nat/nat_api.c
@@ -709,7 +709,11 @@ GNUNET_NAT_request_reversal (struct GNUNET_NAT_Handle *nh,
 void
 GNUNET_NAT_unregister (struct GNUNET_NAT_Handle *nh)
 {
-  GNUNET_MQ_destroy (nh->mq);
+  if (NULL != nh->mq)
+  {
+    GNUNET_MQ_destroy (nh->mq);
+    nh->mq = NULL;
+  }
   GNUNET_free (nh->reg);
   GNUNET_free (nh);
 }
-- 
2.25.1