fix texture leak

stepmania/src/ModelTypes.cpp

@@ -22,6 +22,11 @@ AnimatedTexture::AnimatedTexture()
 	fSecsIntoFrame = 0;
 }
 
+AnimatedTexture::~AnimatedTexture()
+{
+	Unload();
+}
+
 void AnimatedTexture::Load( CString sTexOrIniPath )
 {
 	ASSERT( vFrames.empty() );	// don't load more than once
@@ -107,3 +112,12 @@ int AnimatedTexture::GetNumStates()
 {
 	return vFrames.size();
 }
+
+void AnimatedTexture::Unload()
+{
+	for(unsigned i = 0; i < vFrames.size(); ++i)
+		TEXTUREMAN->UnloadTexture(vFrames[i].pTexture);
+	vFrames.clear();
+	iCurState = 0;
+	fSecsIntoFrame = 0;
+}

stepmania/src/ModelTypes.h

@@ -99,8 +99,10 @@ class RageTexture;
 struct AnimatedTexture
 {
 	AnimatedTexture();
+	~AnimatedTexture();
 	
 	void Load( CString sTexOrIniFile );
+	void Unload();
 	void Update( float fDelta );
 	
 	RageTexture* GetCurrentTexture();