From 5be32df7a2289ad10b1045cff0d1f564f39ec951 Mon Sep 17 00:00:00 2001
From: "p.kosyh" <p.kosyh@gmail.com>
Date: Thu, 15 Jul 2010 10:53:59 +0000
Subject: [PATCH] check vroom parameter

---
 stead/stead.lua | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/stead/stead.lua b/stead/stead.lua
index 5ab29a3..af40d71 100644
--- a/stead/stead.lua
+++ b/stead/stead.lua
@@ -2155,6 +2155,9 @@ function isVroom(v)
 end
 
 function vroom(name, w)
+	if w == nil then
+		error("Wrong parameter to vroom.", 2);
+	end
 	return room { vroom_type = true, nam = name, where = deref(w), enter = vroom_enter, save = vroom_save, };
 end