merge dupe code into GrayArrow::Load

stepmania/src/GrayArrow.cpp

@@ -16,6 +16,8 @@
 #include "GameState.h"
 #include <math.h>
 #include "ThemeManager.h"
+#include "NoteFieldPositioning.h"
+#include "NoteSkinManager.h"
 
 #include "RageLog.h"
 
@@ -31,6 +33,23 @@ GrayArrow::GrayArrow()
 	StopAnimating();
 }
 
+bool GrayArrow::Load( PlayerNumber pn, int iColNo )
+{
+	CString Button = g_NoteFieldMode[pn].GrayButtonNames[iColNo];
+	if( Button == "" )
+		Button = NoteSkinManager::ColToButtonName( iColNo );
+
+	CString sPath = NOTESKIN->GetPathTo( pn, Button, "receptor" );
+	bool ret = Sprite::Load( sPath );
+
+	// XXX
+	if( GetNumStates() != 2 &&
+		GetNumStates() != 3 )
+		RageException::Throw( "'%s' must have 2 or 3 frames", sPath.c_str() );
+
+	return ret;
+}
+
 void GrayArrow::Update( float fDeltaTime )
 {
 	ASSERT( Sprite::GetNumStates() > 0 );	// you forgot to call Load()