don't show unused lights

stepmania/src/GameDef.cpp

@@ -20,6 +20,13 @@
 #include "InputMapper.h"
 #include "PrefsManager.h"
 
+int	GameDef::GetNumGameplayButtons()
+{
+	int iIndexOfStart = ButtonNameToIndex( "Start" );
+	ASSERT( iIndexOfStart != GAME_BUTTON_INVALID );
+	return iIndexOfStart;
+}
+
 GameButton GameDef::ButtonNameToIndex( const CString &sButtonName ) const
 {
 	for( int i=0; i<m_iButtonsPerController; i++ ) 

stepmania/src/GameDef.h

@@ -48,6 +48,7 @@ public:
 	char	m_szDescription[60];
 	int		m_iNumControllers;
 	int		m_iButtonsPerController;
+	int		GetNumGameplayButtons();
 	char	m_szButtonNames[MAX_GAME_BUTTONS][60];	// The name used by the button graphics system.  e.g. "left", "right", "middle C", "snare"
 	char	m_szSecondaryFunction[MAX_GAME_BUTTONS][60];	// displayed on the mapping screen
 	GameButton	m_DedicatedMenuButton[NUM_MENU_BUTTONS];

stepmania/src/ScreenTestLights.cpp

@@ -60,8 +60,8 @@ void ScreenTestLights::Update( float fDeltaTime )
 	int iSec = (int)RageTimer::GetTimeSinceStart();
 
 	CabinetLight cl = (CabinetLight)(iSec%NUM_CABINET_LIGHTS);
-	int iNumGameButtons = GAMESTATE->GetCurrentGameDef()->m_iButtonsPerController;
-	GameButton gb = (GameButton)(iSec%iNumGameButtons);
+	int iNumGameButtonsToShow = GAMESTATE->GetCurrentGameDef()->GetNumGameplayButtons();
+	GameButton gb = (GameButton)(iSec%iNumGameButtonsToShow);
 	CString sCabLight = CabinetLightToString(cl);
 	CString sGameButton = GAMESTATE->GetCurrentGameDef()->m_szButtonNames[gb];
 

stepmania/src/arch/Lights/LightsDriver_SystemMessage.cpp

@@ -12,6 +12,8 @@
 
 #include "LightsDriver_SystemMessage.h"
 #include "ScreenManager.h"
+#include "GameState.h"
+#include "GameDef.h"
 
 
 LightsDriver_SystemMessage::LightsDriver_SystemMessage()
@@ -32,11 +34,13 @@ void LightsDriver_SystemMessage::Set( const LightsState *ls )
 		s += ls->m_bCabinetLights[cl] ? '1' : '0';
 	}
 	s += "\n";
+
+	int iNumGameButtonsToShow = GAMESTATE->GetCurrentGameDef()->GetNumGameplayButtons();
 	
 	FOREACH_GameController( gc )
 	{
 		s += ssprintf("Controller%d: ",gc+1);
-		FOREACH_GameButton( gb )
+		for( int gb=0; gb<iNumGameButtonsToShow; gb++ )
 		{
 			s += ls->m_bGameButtonLights[gc][gb] ? '1' : '0';
 		}