IPSEC: support GCM in ESP

Change-Id: Id2ddb77b4ec3dd543d6e638bc882923f2bac011d
Signed-off-by: Neale Ranns <nranns@cisco.com>
diff --git a/src/vnet/ipsec/ipsec_api.c b/src/vnet/ipsec/ipsec_api.c
index 753d753..767cd2f 100644
--- a/src/vnet/ipsec/ipsec_api.c
+++ b/src/vnet/ipsec/ipsec_api.c
@@ -390,7 +390,7 @@
     rv = ipsec_sa_add (id, spi, proto,
 		       crypto_alg, &crypto_key,
 		       integ_alg, &integ_key, flags,
-		       0, &tun_src, &tun_dst, &sa_index);
+		       0, 0, &tun_src, &tun_dst, &sa_index);
   else
     rv = ipsec_sa_del (id);