Fix unsigned sscanf format

After coverity tool scan, some warnings about signed/unsigned conflicts in
sscanf format string were found. Not a serious problem, but better to be
correct.

iptunnel.c

@@ -491,7 +491,7 @@ static int do_tunnels_list(struct ip_tunnel_parm *p)
 			fclose(fp);
 			return -1;
 		}
-		if (sscanf(ptr, "%ld%ld%ld%ld%ld%ld%ld%*d%ld%ld%ld%ld%ld%ld%ld",
+		if (sscanf(ptr, "%lu%lu%lu%lu%lu%lu%lu%*u%lu%lu%lu%lu%lu%lu%lu",
 			   &rx_bytes, &rx_packets, &rx_errs, &rx_drops,
 			   &rx_fifo, &rx_frame, &rx_multi,
 			   &tx_bytes, &tx_packets, &tx_errs, &tx_drops,

netstat.c

@@ -1603,7 +1603,7 @@ static int ipx_info(void)
 	/* eat line */;
 
     while (fgets(buf, 255, f) != NULL) {
-	sscanf(buf, "%s %s %lX %lX %d %d",
+	sscanf(buf, "%s %s %lX %lX %u %u",
 	       sad, dad, &txq, &rxq, &state, &uid);
 	if ((st = rindex(sad, ':'))) {
 	    *st++ = '\0';