ss: Fix case when UDP is printed as ipproto-xxx

When 'ss' prints UDP sockets info together with RAW sockets
e.g.:

    $ ss -a

then UDP sockets are resolved as "ipproto-xxx".

It was caused that dg_proto was set after printing UDP
socket info from netlink. So fixed issue by moving
setting dg_proto before printing info from Netlink.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

misc/ss.c

@@ -2287,12 +2287,12 @@ static int udp_show(struct filter *f)
 {
 	FILE *fp = NULL;
 
+	dg_proto = UDP_PROTO;
+
 	if (!getenv("PROC_NET_UDP") && !getenv("PROC_ROOT")
 	    && inet_show_netlink(f, NULL, IPPROTO_UDP) == 0)
 		return 0;
 
-	dg_proto = UDP_PROTO;
-
 	if (f->families&(1<<AF_INET)) {
 		if ((fp = net_udp_open()) == NULL)
 			goto outerr;