From 7df2dd67bd7db982f6f9b28348068c7af97bafa8 Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon@gmx.de>
Date: Wed, 19 Aug 2015 09:19:08 +0200
Subject: [PATCH] another fix for LWIP_MULTICAST_TX_OPTIONS: without LWIP_IGMP,
 udp_pcb->mcast_ttl was not initialized

---
 src/core/udp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/core/udp.c b/src/core/udp.c
index 2d25f6c4..09d20b46 100644
--- a/src/core/udp.c
+++ b/src/core/udp.c
@@ -1120,9 +1120,9 @@ udp_new(void)
     /* initialize PCB to all zeroes */
     memset(pcb, 0, sizeof(struct udp_pcb));
     pcb->ttl = UDP_TTL;
-#if LWIP_IGMP
+#if LWIP_MULTICAST_TX_OPTIONS
     pcb->mcast_ttl = UDP_TTL;
-#endif
+#endif /* LWIP_MULTICAST_TX_OPTIONS */
   }
   return pcb;
 }