From 14919e34a1f4095922da6174f57343c96d86e88d Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon@gmx.de>
Date: Fri, 15 Sep 2017 11:44:22 +0200
Subject: [PATCH] icmp_input: fix possibly unused variable (used for debug
 output only)

---
 src/core/ipv4/icmp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/core/ipv4/icmp.c b/src/core/ipv4/icmp.c
index c71a566d..71af6e8a 100644
--- a/src/core/ipv4/icmp.c
+++ b/src/core/ipv4/icmp.c
@@ -105,6 +105,8 @@ icmp_input(struct pbuf *p, struct netif *inp)
   type = *((u8_t *)p->payload);
 #ifdef LWIP_DEBUG
   code = *(((u8_t *)p->payload)+1);
+  /* if debug is enabled but debug statement below is somehow disabled: */
+  LWIP_UNUSED_ARG(code);
 #endif /* LWIP_DEBUG */
   switch (type) {
   case ICMP_ER: