From f2de3215c3812e777be99702c3cc9e5cca65ca0d Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon@gmx.de>
Date: Fri, 20 Jan 2012 21:21:10 +0100
Subject: [PATCH] pbuf_copy(): moved the check for "p_to != NULL" to a better
 place.

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

diff --git a/src/core/pbuf.c b/src/core/pbuf.c
index a458b167..1258bb36 100644
--- a/src/core/pbuf.c
+++ b/src/core/pbuf.c
@@ -863,7 +863,6 @@ pbuf_copy(struct pbuf *p_to, struct pbuf *p_from)
   /* iterate through pbuf chain */
   do
   {
-    LWIP_ERROR("p_to != NULL", p_to != NULL, return ERR_ARG;);
     /* copy one part of the original chain */
     if ((p_to->len - offset_to) >= (p_from->len - offset_from)) {
       /* complete current p_from fits into current p_to */
@@ -880,6 +879,7 @@ pbuf_copy(struct pbuf *p_to, struct pbuf *p_from)
       /* on to next p_to (if any) */
       offset_to = 0;
       p_to = p_to->next;
+      LWIP_ERROR("p_to != NULL", p_to != NULL, return ERR_ARG;);
     }
     LWIP_ASSERT("offset_from <= p_from->len", offset_from <= p_from->len);
     if (offset_from >= p_from->len) {