NULL-terminate load_balance_nsh_nodes[]

Change-Id: Ibc5528bea564f6c2b0ff34220405395bc78274fc
Signed-off-by: Gabriel Ganne <gabriel.ganne@enea.com>
diff --git a/src/vnet/dpo/load_balance.c b/src/vnet/dpo/load_balance.c
index b48702a..8074555 100644
--- a/src/vnet/dpo/load_balance.c
+++ b/src/vnet/dpo/load_balance.c
@@ -815,6 +815,7 @@
 const static char* const load_balance_nsh_nodes[] =
 {
     "nsh-load-balance",
+    NULL
 };
 const static char* const load_balance_bier_nodes[] =
 {