We don't know which players are joined until BeginScreen, so always load

assets for both players (fixes preload asserts).  This isn't an important
optimization point: it's not acceptable for a screen to be so much slower in
2-player than 1-player that this type of optimization would matter.  Also, always
loading both players will help reduce the chance of code that's too slow in
2-player not being noticed due to only being tested in 1-player.

stepmania/src/ScreenOptions.cpp

@@ -124,7 +124,7 @@ void ScreenOptions::Init()
 	m_framePage.AddChild( m_sprPage );
 
 	// init line line highlights
-	FOREACH_HumanPlayer( p )
+	FOREACH_PlayerNumber( p )
 	{
 		m_sprLineHighlight[p].Load( THEME->GetPathG(m_sName,"line highlight") );
 		m_sprLineHighlight[p].SetName( "LineHighlight" );
@@ -133,7 +133,7 @@ void ScreenOptions::Init()
 	}
 
 	// init cursors
-	FOREACH_HumanPlayer( p )
+	FOREACH_PlayerNumber( p )
 	{
 		m_Cursor[p].Load( m_sName, OptionsCursor::cursor );
 		m_Cursor[p].Set( p );