From 25cd668ca7110128bf9c4bc0e165ff6677a209b6 Mon Sep 17 00:00:00 2001
From: "7u83@mail.ru" <7u83@mail.ru@noemail.net>
Date: Fri, 1 May 2015 11:00:16 +0000
Subject: [PATCH] Fixed null pointer seg fault in cmp function.

FossilOrigin-Name: d0d1763f670212506f67155c605b0d693ba79c9b3ab51cd669e1495aa2a10978
---
 src/capwap/action.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/capwap/action.c b/src/capwap/action.c
index 7ca29f50..b1a6b14f 100644
--- a/src/capwap/action.c
+++ b/src/capwap/action.c
@@ -149,7 +149,20 @@ static int cw_action_out_cmp(const void *elem1, const void *elem2)
 	if (r != 0)
 		return r;
 
-	r = strcmp(e1->item_id, e2->item_id);
+	if (!e1->item_id && !e2->item_id){
+		r=0;
+	}
+	else{
+		if (!e1->item_id) {
+			r = strcmp("", e2->item_id);
+		}
+		else if (!e2->item_id){
+			r = strcmp(e1->item_id,"");
+		}
+		else{
+			r = strcmp(e1->item_id, e2->item_id);
+		}
+	}
 	if (r != 0)
 		return r;