rto_min value display overflow

Reported by: Satoru SATOH <satoru.satoh@gmail.com>
"ip route show" does not print correct value when larger rto_min is
set (e.g. 3sec).

This problem is because of overflow in print_route() and
the patch below is a workaround fix for that.

[root test]# ./iproute2.git.org/ip/ip route show dev eth1
192.168.140.0/24  proto kernel  scope link  src 192.168.140.130
169.254.0.0/16  scope link
[root test]# ./iproute2.git.org/ip/ip route change 192.168.140.0/24
dev eth1 rto_min 3s
[root test]# ./iproute2.git.org/ip/ip route show dev eth1
192.168.140.0/24  scope link  rto_min lock 2ms     <-- wrong
169.254.0.0/16  scope link
[root test]# ./iproute2.git/ip/ip route show dev eth1  # patched version
192.168.140.0/24  scope link  rto_min lock 3000ms  <-- correct
169.254.0.0/16  scope link

This is a simpler fix.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>

ip/iproute.c

@@ -509,7 +509,7 @@ int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 			    i != RTAX_RTO_MIN)
 				fprintf(fp, " %u", *(unsigned*)RTA_DATA(mxrta[i]));
 			else {
-				unsigned val = *(unsigned*)RTA_DATA(mxrta[i]);
+				unsigned long long val = *(unsigned*)RTA_DATA(mxrta[i]);
 
 				val *= 1000;
 				if (i == RTAX_RTT)
@@ -517,7 +517,7 @@ int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 				else if (i == RTAX_RTTVAR)
 					val /= 4;
 				if (val >= hz)
-					fprintf(fp, " %ums", val/hz);
+					fprintf(fp, " %llums", val/hz);
 				else
 					fprintf(fp, " %.2fms", (float)val/hz);
 			}