[klibc] valgrind ipconfig work

[maximilian attems]

this is just on the common path, need to checkout others too,
but a start:

commit 5501109f6597f2bbed17a264b247c36220362dfb
Author: maximilian attems <max at stro.at>
Date:   Mon Apr 26 08:07:51 2010 +0200

    [klibc] ipconfig: Fix valgrind errors
    
    valgrind was rightfully complaining on ipconfig eth0:
    ERROR SUMMARY: 5 errors from 4 contexts (suppressed: 0 from 0)
    
    all errors where stack allocations pointing to unitialized values,
    now:
    ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0
    
    as bonus cleanup a bit coding style of packet_send().
    
    Signed-off-by: maximilian attems <max at stro.at>

diff --git a/usr/kinit/ipconfig/netdev.c b/usr/kinit/ipconfig/netdev.c
index 6e3014f..e203d0c 100644
--- a/usr/kinit/ipconfig/netdev.c
+++ b/usr/kinit/ipconfig/netdev.c
@@ -43,6 +43,7 @@ static int netdev_sif_addr(struct ifreq *ifr, int cmd, uint32_t addr)
 {
 	struct sockaddr_in sin;
 
+	memset(&sin, 0, sizeof(sin));
 	sin.sin_family = AF_INET;
 	sin.sin_addr.s_addr = addr;
 
diff --git a/usr/kinit/ipconfig/packet.c b/usr/kinit/ipconfig/packet.c
index 508c7ba..4df5431 100644
--- a/usr/kinit/ipconfig/packet.c
+++ b/usr/kinit/ipconfig/packet.c
@@ -114,16 +114,18 @@ static char *ntoa(uint32_t addr)
 int packet_send(struct netdev *dev, struct iovec *iov, int iov_len)
 {
 	struct sockaddr_ll sll;
-	struct msghdr msg = {
-		.msg_name	= &sll,
-		.msg_namelen	= sizeof(sll),
-		.msg_iov	= iov,
-		.msg_iovlen	= iov_len,
-		.msg_control	= NULL,
-		.msg_controllen	= 0,
-		.msg_flags	= 0
-	};
 	int i, len = 0;
+	struct msghdr msg;
+
+	memset(&sll, 0, sizeof(sll));
+
+	msg.msg_name = &sll;
+	msg.msg_namelen = sizeof(sll);
+	msg.msg_iov = iov;
+	msg.msg_iovlen = iov_len;
+	msg.msg_control = NULL;
+	msg.msg_controllen = 0;
+	msg.msg_flags = 0;
 
 	if (cfg_local_port != LOCAL_PORT) {
 		ipudp_hdrs.udp.source = htons(cfg_local_port);