LISP-GPE: add dump call for VNIs in use

Change-Id: I394af7c1ac9fd0177ff5d298e4008245df54b436
Signed-off-by: Filip Tehlar <ftehlar@cisco.com>
diff --git a/src/vnet/lisp-gpe/lisp_gpe_fwd_entry.h b/src/vnet/lisp-gpe/lisp_gpe_fwd_entry.h
index b9d9c98..1580351 100644
--- a/src/vnet/lisp-gpe/lisp_gpe_fwd_entry.h
+++ b/src/vnet/lisp-gpe/lisp_gpe_fwd_entry.h
@@ -217,6 +217,8 @@
 extern void
 vnet_lisp_gpe_add_fwd_counters (vnet_lisp_gpe_add_del_fwd_entry_args_t * a,
 				u32 fwd_entry_index);
+extern u32 *vnet_lisp_gpe_get_fwd_entry_vnis (void);
+
 #endif
 
 /*