From 8f3df7c862e496ae3beab0254fab8bdbd63cbe04 Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon@gmx.de>
Date: Thu, 17 May 2018 20:57:02 +0200
Subject: [PATCH] tcp: fix const warning for LWIP_NETIF_HWADDRHINT==1

---
 src/core/tcp_out.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/tcp_out.c b/src/core/tcp_out.c
index 80acf227..c8ae4e34 100644
--- a/src/core/tcp_out.c
+++ b/src/core/tcp_out.c
@@ -1875,7 +1875,7 @@ tcp_output_control_segment(const struct tcp_pcb *pcb, struct pbuf *p,
     }
 #endif
     if (pcb != NULL) {
-      NETIF_SET_HINTS(netif, &(pcb->netif_hints));
+      NETIF_SET_HINTS(netif, LWIP_CONST_CAST(struct netif_hint*, &(pcb->netif_hints)));
       ttl = pcb->ttl;
       tos = pcb->tos;
     } else {