Fix typo in tunnel code (o_key vs. i_key).

If a dotted quad ikey is specified for GRE tunnels, it gets set as the
okey instead.  This patch fixes it. (http://bugs.debian.org/200714)

Signed-off-by: Andreas Henriksson <andreas@fatal.se>
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
diff --git a/ip/iptunnel.c b/ip/iptunnel.c
index 828d80a..aee526b 100644
--- a/ip/iptunnel.c
+++ b/ip/iptunnel.c
@@ -113,7 +113,7 @@
 			NEXT_ARG();
 			p->i_flags |= GRE_KEY;
 			if (strchr(*argv, '.'))
-				p->o_key = get_addr32(*argv);
+				p->i_key = get_addr32(*argv);
 			else {
 				if (get_unsigned(&uval, *argv, 0)<0) {
 					fprintf(stderr, "invalid value of \"ikey\"\n");