From 1509d09ad485a44ee8034cf741e35d44df76cea9 Mon Sep 17 00:00:00 2001
From: Steve Checkoway <stevecheckoway@users.sourceforge.net>
Date: Fri, 26 Dec 2008 08:50:47 +0000
Subject: [PATCH] Check that there is actually an argument at that position
 before attempting to do something with it.

---
 stepmania/src/EnumHelper.cpp | 2 ++
 stepmania/src/LuaBinding.cpp | 1 +
 stepmania/src/LuaManager.h   | 1 +
 3 files changed, 4 insertions(+)

diff --git a/stepmania/src/EnumHelper.cpp b/stepmania/src/EnumHelper.cpp
index fa2111912f..49e837d33a 100644
--- a/stepmania/src/EnumHelper.cpp
+++ b/stepmania/src/EnumHelper.cpp
@@ -5,6 +5,8 @@
 
 int CheckEnum( lua_State *L, LuaReference &table, int iPos, int iInvalid, const char *szType, bool bAllowInvalid )
 {
+	luaL_checkany( L, iPos );
+
 	if( lua_isnil(L, iPos) )
 	{
 		if( bAllowInvalid )
diff --git a/stepmania/src/LuaBinding.cpp b/stepmania/src/LuaBinding.cpp
index c25b29b7e2..1e6717a5de 100644
--- a/stepmania/src/LuaBinding.cpp
+++ b/stepmania/src/LuaBinding.cpp
@@ -226,6 +226,7 @@ bool LuaBinding::CheckLuaObjectType( lua_State *L, int iArg, const char *szType
 #if defined(FAST_LUA)
 	return true;
 #endif
+	luaL_checkany( L, iArg );
 
 	/* Check that szType is in metatable.heirarchy. */
 	if( !luaL_getmetafield(L, iArg, "heirarchy") )
diff --git a/stepmania/src/LuaManager.h b/stepmania/src/LuaManager.h
index f7ff8e63c1..7102f0ebb3 100644
--- a/stepmania/src/LuaManager.h
+++ b/stepmania/src/LuaManager.h
@@ -190,6 +190,7 @@ inline bool MyLua_checkboolean (lua_State *L, int numArg)
  * used to mean "cmd,false". */
 inline bool MyLua_checkintboolean( lua_State *L, int iArg )
 {
+	luaL_checkany( L, iArg );
 	int iType = lua_type( L, iArg );
 	if( iType == LUA_TNUMBER )
 	{