ip-neighbor: set link-type ARP on incomplete adjacencies

Type: fix

Change-Id: I05d74da311d6a86ec4eb3df50d53ecaa9c622f50
Signed-off-by: Neale Ranns <nranns@cisco.com>
diff --git a/src/vnet/ip-neighbor/ip_neighbor.c b/src/vnet/ip-neighbor/ip_neighbor.c
index ceec373..d8c386d 100644
--- a/src/vnet/ip-neighbor/ip_neighbor.c
+++ b/src/vnet/ip-neighbor/ip_neighbor.c
@@ -339,7 +339,7 @@
 			  ethernet_build_rewrite (vnet_get_main (),
 						  adj->
 						  rewrite_header.sw_if_index,
-						  adj_get_link_type (ai),
+						  VNET_LINK_ARP,
 						  VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
 }