From 028d447b5983bcbd7124ee008dbc52f9df674461 Mon Sep 17 00:00:00 2001
From: Marcelo Araujo <araujo@FreeBSD.org>
Date: Tue, 19 Apr 2016 01:57:56 +0000
Subject: [PATCH] Use NULL instead of 0 for pointers.

malloc will return NULL if it cannot allocate memory.

MFC after:	2 weeks.
---
 sbin/ping6/ping6.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sbin/ping6/ping6.c b/sbin/ping6/ping6.c
index 03381e03431..7e1719ae515 100644
--- a/sbin/ping6/ping6.c
+++ b/sbin/ping6/ping6.c
@@ -863,7 +863,7 @@ main(int argc, char *argv[])
 
 	/* set IP6 packet options */
 	if (ip6optlen) {
-		if ((scmsg = (char *)malloc(ip6optlen)) == 0)
+		if ((scmsg = (char *)malloc(ip6optlen)) == NULL)
 			errx(1, "can't allocate enough memory");
 		smsghdr.msg_control = (caddr_t)scmsg;
 		smsghdr.msg_controllen = ip6optlen;