Fix a memory leak on MusicWheel.

Mac's Leaks claims it's fixed anyway.

src/MusicWheelItem.cpp

@@ -170,6 +170,10 @@ MusicWheelItem::MusicWheelItem( const MusicWheelItem &cpy ):
 
 MusicWheelItem::~MusicWheelItem()
 {
+	FOREACH_ENUM( MusicWheelItemType, i )
+	{
+		SAFE_DELETE(m_pText[i]);
+	}
 	delete m_pTextSectionCount;
 }