From f364dc07e28006d4a004860885448fd538201da7 Mon Sep 17 00:00:00 2001
From: Julien Danjou <julien@danjou.info>
Date: Wed, 9 Jul 2008 14:07:49 +0200
Subject: [PATCH] lua: check f against REFNIL

Signed-off-by: Julien Danjou <julien@danjou.info>
---
 lua.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lua.h b/lua.h
index 8b895f93..7052f584 100644
--- a/lua.h
+++ b/lua.h
@@ -79,7 +79,7 @@ typedef int luaA_function;
 
 #define luaA_dofunction(L, f, n, r) \
     do { \
-        if(f) \
+        if(f != LUA_REFNIL) \
         { \
             lua_rawgeti(L, LUA_REGISTRYINDEX, f); \
             if(n) \