add metric to put timer in stealth mode

stepmania/src/MenuTimer.cpp

@@ -94,7 +94,10 @@ void MenuTimer::Update( float fDeltaTime )
 	}
 
 	if( iNewDisplay <= WARNING_BEEP_START )
-		m_soundBeep.Play();
+	{
+		if( m_soundBeep.IsLoaded() )
+			m_soundBeep.Play();
+	}
 }
 
 

stepmania/src/RageSound.cpp

@@ -136,6 +136,11 @@ void RageSound::Unload()
 	databuf.clear();
 }
 
+bool RageSound::IsLoaded()
+{
+	return Sample != NULL;
+}
+
 void RageSound::Fail(CString reason)
 {
 	LOG->Warn("Decoding %s failed: %s", GetLoadedFilePath().c_str(), reason.c_str() );

stepmania/src/RageSound.h

@@ -97,6 +97,7 @@ public:
 	 * be set up only if needed.  Doesn't fail. */
 	void LoadSoundReader( SoundReader *pSound );
 	void Unload();
+	bool IsLoaded();
 
 	void StartPlaying();
 	void StopPlaying();

stepmania/src/ScreenWithMenuElements.cpp

@@ -10,6 +10,7 @@
 #include "ScreenManager.h"
 
 #define TIMER_SECONDS			THEME->GetMetricI(m_sName,"TimerSeconds")
+#define TIMER_STEALTH			THEME->GetMetricB(m_sName,"TimerStealth")
 #define STYLE_ICON				THEME->GetMetricB(m_sName,"StyleIcon")
 #define MEMORY_CARD_ICONS		THEME->GetMetricB(m_sName,"MemoryCardIcons")
 
@@ -65,6 +66,8 @@ ScreenWithMenuElements::ScreenWithMenuElements( CString sClassName ) : Screen( s
 	if( m_bTimerEnabled )
 	{
 		m_MenuTimer->SetName( "Timer" );
+		if( TIMER_STEALTH )
+			m_MenuTimer->EnableStealth( true );
 		UtilSetXY( m_MenuTimer, m_sName );
 		UtilOnCommand( m_MenuTimer, m_sName );
 		ResetTimer();