[LifeMeterBattery] Added ChangeLives(int) Lua binding.

Docs/Changelog_sm5.txt

@@ -10,6 +10,7 @@ StepMania 5.0 Preview 2 | 20110???
 
 2011/06/13
 ----------
+* [LifeMeterBattery] Added ChangeLives(int) Lua binding. [AJ]
 * [LifeMeterBattery] Added DangerThreshold metric. [AJ]
 * [LifeMeterBattery] Added some important metrics. [AJ]
  * MinScoreToKeepLife='TapNoteScore_*' - any score below this = loss of life.

src/LifeMeterBattery.cpp

@@ -137,6 +137,14 @@ void LifeMeterBattery::AddLives( int iLives )
 	m_fBatteryBlinkTime = 0;
 }
 
+void LifeMeterBattery::ChangeLives(int iLifeDiff)
+{
+	if( iLifeDiff < 0 )
+		SubtractLives( abs(iLifeDiff) );
+	else if( iLifeDiff > 0 )
+		AddLives(iLifeDiff);
+}
+
 void LifeMeterBattery::ChangeLife( TapNoteScore score )
 {
 	if( m_iLivesLeft == 0 )
@@ -254,13 +262,14 @@ class LunaLifeMeterBattery: public Luna<LifeMeterBattery>
 {
 public:
 	static int GetLivesLeft( T* p, lua_State *L )	{ lua_pushnumber( L, p->GetLivesLeft() ); return 1; }
-	// is this right? wtf -q2x
 	static int GetTotalLives( T* p, lua_State *L )	{ lua_pushnumber( L, GAMESTATE->m_SongOptions.GetSong().m_iBatteryLives ); return 1; }
+	static int ChangeLives( T* p, lua_State *L )	{ p->ChangeLives(IArg(1)); return 0; }
 
 	LunaLifeMeterBattery()
 	{
 		ADD_METHOD( GetLivesLeft );
 		ADD_METHOD( GetTotalLives );
+		ADD_METHOD( ChangeLives );
 	}
 };
 

src/LifeMeterBattery.h

@@ -32,6 +32,7 @@ public:
 
 	void Refresh();
 	int GetLivesLeft() { return m_iLivesLeft; }
+	void ChangeLives(int iLifeDiff);
 
 	// Lua
 	virtual void PushSelf( lua_State *L );