From 0b410d9c570e4c5af73425d136042e0682988df7 Mon Sep 17 00:00:00 2001
From: Marcelo Araujo <araujo@FreeBSD.org>
Date: Tue, 19 Apr 2016 01:01:22 +0000
Subject: [PATCH] Use NULL instead of 0.

malloc will return NULL in case it cannot allocate memory.

MFC after:	2 weeks.
---
 sbin/dump/traverse.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sbin/dump/traverse.c b/sbin/dump/traverse.c
index 8a9a378dfc40..2aa0305a6867 100644
--- a/sbin/dump/traverse.c
+++ b/sbin/dump/traverse.c
@@ -928,7 +928,7 @@ bread(ufs2_daddr_t blkno, char *buf, int size)
 		if (cnt == size)
 			return;
 	} else {
-		if (tmpbuf == NULL && (tmpbuf = malloc(secsize)) == 0)
+		if (tmpbuf == NULL && (tmpbuf = malloc(secsize)) == NULL)
 			quit("buffer malloc failed\n");
 		xfer = 0;
 		bytes = size;