Use of 0 as NULL causes sparse complaint.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>

--- a/net/ipv4/netfilter/nf_nat_snmp_basic.c	2008-01-23 10:07:23.000000000 -0800
+++ b/net/ipv4/netfilter/nf_nat_snmp_basic.c	2008-01-23 10:07:31.000000000 -0800
@@ -260,7 +260,7 @@ static unsigned char asn1_eoc_decode(str
 {
 	unsigned char ch;
 
-	if (eoc == 0) {
+	if (eoc == NULL) {
 		if (!asn1_octet_decode(ctx, &ch))
 			return 0;
 

-- 
Stephen Hemminger <stephen.hemminger@vyatta.com>