From 0ef3b9b3c5eab3127bb2efc7b496d6c46b698a41 Mon Sep 17 00:00:00 2001
From: anderscarlman <anderscarlman>
Date: Sat, 26 Apr 2003 20:32:23 +0000
Subject: [PATCH] Re-added code for checking tail-parameter for NULL in
 pbuf_chain() to provide for better backward compatibility.

---
 src/core/pbuf.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/core/pbuf.c b/src/core/pbuf.c
index ead20bee..75fcf0af 100644
--- a/src/core/pbuf.c
+++ b/src/core/pbuf.c
@@ -642,6 +642,9 @@ pbuf_chain(struct pbuf *h, struct pbuf *t)
 
   LWIP_ASSERT("h != NULL", h != NULL);
   LWIP_ASSERT("t != NULL", t != NULL);
+
+  if(t == NULL)
+    return;
   
   /* proceed to last pbuf of chain */
   for (p = h; p->next != NULL; p = p->next) {