From bfc70f045a8e34de985f7e8bcbcc2fca52e404e9 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Thu, 26 Jan 2012 22:50:42 +0000
Subject: [PATCH] -allow NULL

---
 src/util/helper.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/util/helper.c b/src/util/helper.c
index c7e059237..029203638 100644
--- a/src/util/helper.c
+++ b/src/util/helper.c
@@ -189,7 +189,8 @@ stop_helper (struct GNUNET_HELPER_Handle *h)
     GNUNET_CONTAINER_DLL_remove (h->mq_head,
 				 h->mq_tail,
 				 qe);
-    qe->cont (qe->cont_cls, GNUNET_NO);
+    if (NULL != qe->cont)
+      qe->cont (qe->cont_cls, GNUNET_NO);
     GNUNET_free (qe);
   }
   /* purge MST buffer */
@@ -387,7 +388,8 @@ GNUNET_HELPER_stop (struct GNUNET_HELPER_Handle *h)
     GNUNET_CONTAINER_DLL_remove (h->mq_head,
 				 h->mq_tail,
 				 qe);
-    qe->cont (qe->cont_cls, GNUNET_SYSERR);
+    if (NULL != qe->cont)
+      qe->cont (qe->cont_cls, GNUNET_SYSERR);
     GNUNET_free (qe);
   }
   stop_helper (h);
-- 
2.25.1