gossipd/routing: free everything at end of tests.

valgrind complains, but using a destructor on the node map is a good
idea anyway.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

gossipd/routing.c

@@ -46,6 +46,7 @@ struct node_map *empty_node_map(const tal_t *ctx)
 {
 	struct node_map *map = tal(ctx, struct node_map);
 	node_map_init(map);
+	tal_add_destructor(map, node_map_clear);
 	return map;
 }
 

gossipd/test/run-find_route-specific.c

@@ -120,5 +120,6 @@ int main(void)
 	assert(pubkey_eq(&route[0]->dst->id, &c));
 
 	tal_free(ctx);
+	secp256k1_context_destroy(secp256k1_ctx);
 	return 0;
 }

gossipd/test/run-find_route.c

@@ -123,5 +123,6 @@ int main(void)
 	assert(fee == 0 + 6);
 
 	tal_free(ctx);
+	secp256k1_context_destroy(secp256k1_ctx);
 	return 0;
 }