have ActorCommands push themself

stepmania/src/Actor.cpp

@@ -677,8 +677,7 @@ void Actor::AddRotationR( float rot )
 
 void Actor::RunCommands( const ActorCommands& cmds )
 {
-	lua_pushstring(LUA->L, cmds.GetFunctionName()); // function name
-	lua_gettable(LUA->L, LUA_GLOBALSINDEX); // function to be called
+	cmds.PushSelf( LUA->L );
 	this->PushSelf( LUA->L ); // 1st parameter
 	lua_call(LUA->L, 1, 0); // call function with 1 argument and 0 results
 }

stepmania/src/ActorCommands.cpp

@@ -35,7 +35,7 @@ ActorCommands::ActorCommands( const ActorCommands& cpy )
 	 * the function by reference, so we don't make a new function unless we're actually
 	 * changed. */
 	ostringstream s;
-	s << m_sLuaFunctionName << " = " << cpy.GetFunctionName();
+	s << m_sLuaFunctionName << " = " << cpy.m_sLuaFunctionName;
 
 	CString s2 = s.str();
 	LUA->RunScript( s2 );
@@ -50,9 +50,12 @@ ActorCommands &ActorCommands::operator=( const ActorCommands& cpy )
 	return *this;
 }
 
-CString ActorCommands::GetFunctionName() const
+void ActorCommands::PushSelf( lua_State *L ) const
 {
-	return m_sLuaFunctionName;
+	lua_pushstring( L, m_sLuaFunctionName ); // function name
+	lua_gettable( L, LUA_GLOBALSINDEX ); // function to be called
+
+	ASSERT_M( !lua_isnil(L, -1), m_sLuaFunctionName.c_str() )
 }
 
 void ActorCommands::Register( const Commands& cmds )

stepmania/src/ActorCommands.h

@@ -6,6 +6,8 @@
 #include "RageUtil_AutoPtr.h"
 class Commands;
 
+struct lua_State;
+
 class ActorCommands
 {
 public:
@@ -14,8 +16,7 @@ public:
 	ActorCommands( const ActorCommands& cpy );
 	ActorCommands &operator=( const ActorCommands& cpy );
 
-
-	CString GetFunctionName() const;
+	void PushSelf( lua_State *L ) const;
 
 private:
 	void Register( const Commands& cmds );