remove unnecessary initialization to 0

diff -urN a/net/ipv4/netfilter/ip_conntrack_ftp.c b/net/ipv4/netfilter/ip_conntrack_ftp.c
@@ -405,7 +405,6 @@
 		ports[0] = FTP_PORT;
 
 	for (i = 0; (i < MAX_PORTS) && ports[i]; i++) {
-		memset(&ftp[i], 0, sizeof(struct ip_conntrack_helper));
 		ftp[i].tuple.src.u.tcp.port = htons(ports[i]);
 		ftp[i].tuple.dst.protonum = IPPROTO_TCP;
 		ftp[i].mask.src.u.tcp.port = 0xFFFF;

diff -urN a/net/ipv4/netfilter/ip_conntrack_irc.c b/net/ipv4/netfilter/ip_conntrack_irc.c
@@ -259,8 +259,6 @@
 
 	for (i = 0; (i < MAX_PORTS) && ports[i]; i++) {
 		hlpr = &irc_helpers[i];
-		memset(hlpr, 0,
-		       sizeof(struct ip_conntrack_helper));
 		hlpr->tuple.src.u.tcp.port = htons(ports[i]);
 		hlpr->tuple.dst.protonum = IPPROTO_TCP;
 		hlpr->mask.src.u.tcp.port = 0xFFFF;

diff -urN a/net/ipv4/netfilter/ip_nat_ftp.c b/net/ipv4/netfilter/ip_nat_ftp.c
@@ -306,9 +306,6 @@
 		ports[0] = FTP_PORT;
 
 	for (i = 0; (i < MAX_PORTS) && ports[i]; i++) {
-
-		memset(&ftp[i], 0, sizeof(struct ip_nat_helper));
-
 		ftp[i].tuple.dst.protonum = IPPROTO_TCP;
 		ftp[i].tuple.src.u.tcp.port = htons(ports[i]);
 		ftp[i].mask.dst.protonum = 0xFFFF;

diff -urN a/net/ipv4/netfilter/ip_nat_irc.c b/net/ipv4/netfilter/ip_nat_irc.c
@@ -243,9 +243,6 @@
 
 	for (i = 0; (i < MAX_PORTS) && ports[i] != 0; i++) {
 		hlpr = &ip_nat_irc_helpers[i];
-		memset(hlpr, 0,
-		       sizeof(struct ip_nat_helper));
-
 		hlpr->tuple.dst.protonum = IPPROTO_TCP;
 		hlpr->tuple.src.u.tcp.port = htons(ports[i]);
 		hlpr->mask.src.u.tcp.port = 0xFFFF;

diff -urN a/net/ipv4/netfilter/ipt_ULOG.c b/net/ipv4/netfilter/ipt_ULOG.c
@@ -320,7 +320,6 @@
 
 	/* initialize ulog_buffers */
 	for (i = 0; i < ULOG_MAXNLGROUPS; i++) {
-		memset(&ulog_buffers[i], 0, sizeof(ulog_buff_t));
 		init_timer(&ulog_buffers[i].timer);
 		ulog_buffers[i].timer.function = ulog_timer;
 		ulog_buffers[i].timer.data = i;