l2tp: l2tp-decap-local don't accept packets unless configured

Change-Id: I2e48eb772dc44912192d0684b8ee631d8d975e9e
Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
diff --git a/src/vnet/l2tp/l2tp.h b/src/vnet/l2tp/l2tp.h
index a91f00c..4987338 100644
--- a/src/vnet/l2tp/l2tp.h
+++ b/src/vnet/l2tp/l2tp.h
@@ -80,6 +80,8 @@
   vlib_main_t *vlib_main;
   vnet_main_t *vnet_main;
 
+  bool proto_registered;
+
 } l2t_main_t;
 
 /* Packet trace structure */
@@ -118,7 +120,6 @@
 uword unformat_pg_l2tp_header (unformat_input_t * input, va_list * args);
 
 void l2tp_encap_init (vlib_main_t * vm);
-void l2tp_decap_init (void);
 int create_l2tpv3_ipv6_tunnel (l2t_main_t * lm,
 			       ip6_address_t * client_address,
 			       ip6_address_t * our_address,