From f98c3dd4b5186dd1a5f8c2e14fcc3154f8a2068c Mon Sep 17 00:00:00 2001
From: sg <goldsimon@gmx.de>
Date: Thu, 21 Jul 2016 21:54:13 +0200
Subject: [PATCH] LWIP_MPU_COMPATIBLE: help dumb compilers to see 'msg' is used
 (MSVC :(

---
 src/api/api_lib.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/api/api_lib.c b/src/api/api_lib.c
index 32f67090..82da791a 100644
--- a/src/api/api_lib.c
+++ b/src/api/api_lib.c
@@ -445,6 +445,9 @@ netconn_recv_data(struct netconn *conn, void **new_buf)
   err_t err;
 #if LWIP_TCP
   API_MSG_VAR_DECLARE(msg);
+#if LWIP_MPU_COMPATIBLE
+  msg = NULL;
+#endif
 #endif /* LWIP_TCP */
 
   LWIP_ERROR("netconn_recv: invalid pointer", (new_buf != NULL), return ERR_ARG;);
@@ -479,7 +482,7 @@ netconn_recv_data(struct netconn *conn, void **new_buf)
     API_MSG_VAR_ALLOC(msg);
   }
 #endif /* LWIP_TCP */
-    
+
 #if LWIP_SO_RCVTIMEO
   if (sys_arch_mbox_fetch(&conn->recvmbox, &buf, conn->recv_timeout) == SYS_ARCH_TIMEOUT) {
 #if LWIP_TCP