From 2eb9e8837b68f036d08d3b3a0ba945a29f32dd16 Mon Sep 17 00:00:00 2001
From: Glenn Maynard <gmaynard@users.sourceforge.net>
Date: Wed, 2 Feb 2005 03:36:46 +0000
Subject: [PATCH] don't bother parsing for empty commands

---
 stepmania/src/ActorCommands.cpp | 15 ++++++++++++---
 stepmania/src/LuaManager.cpp    |  2 ++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/stepmania/src/ActorCommands.cpp b/stepmania/src/ActorCommands.cpp
index 083d1adb9c..33b9199fd3 100644
--- a/stepmania/src/ActorCommands.cpp
+++ b/stepmania/src/ActorCommands.cpp
@@ -58,6 +58,12 @@ void ActorCommands::PushSelf( lua_State *L ) const
 
 void ActorCommands::Register( const Commands& cmds )
 {
+	if( cmds.v.size() == 0 )
+	{
+		m_sLuaFunctionName = "nop";
+		return;
+	}
+
 	// TODO: calculate a better function name, or figure out how
 	// to keep a pointer directly to the Lua function so no global
 	// table lookup is necessary.
@@ -130,9 +136,12 @@ void ActorCommands::Unregister()
 
 	ASSERT( m_sLuaFunctionName.size() );
 
-	lua_pushstring( LUA->L, m_sLuaFunctionName );
-	lua_pushnil( LUA->L );
-	lua_settable( LUA->L, LUA_GLOBALSINDEX );
+	if( m_sLuaFunctionName != "nop" )
+	{
+		lua_pushstring( LUA->L, m_sLuaFunctionName );
+		lua_pushnil( LUA->L );
+		lua_settable( LUA->L, LUA_GLOBALSINDEX );
+	}
 
 	m_sLuaFunctionName = "";
 }
diff --git a/stepmania/src/LuaManager.cpp b/stepmania/src/LuaManager.cpp
index 0412cec1a7..b467899d88 100644
--- a/stepmania/src/LuaManager.cpp
+++ b/stepmania/src/LuaManager.cpp
@@ -184,6 +184,8 @@ void LuaManager::ResetState()
 	luaopen_string( L );
 	lua_settop(L, 0); // luaopen_* pushes stuff onto the stack that we don't need
 
+	RunScript( "nop = function(self) end" );
+
 	for( const LuaFunctionList *p = g_LuaFunctions; p; p=p->next )
 		lua_register( L, p->name, p->func );