#BGCHANGES1 -> #BGCHANGES2

stepmania/src/NotesLoaderSM.cpp

@@ -337,6 +337,7 @@ bool SMLoader::LoadFromSMFile( CString sPath, Song &out )
 		{
 			BackgroundLayer iLayer = BACKGROUND_LAYER_1;
 			sscanf( sValueName, "BGCHANGES%d", &iLayer );
+			iLayer = (BackgroundLayer)(iLayer-1);
 
 			if( iLayer < 0 && iLayer >= NUM_BackgroundLayer )
 			{

stepmania/src/NotesWriterSM.cpp

@@ -103,7 +103,7 @@ void NotesWriterSM::WriteGlobalTags( RageFile &f, const Song &out )
 		else if( out.GetBackgroundChanges(b).empty() )
 			continue;	// skip
 		else
-			f.Write( ssprintf("#BGCHANGES%d:", b) );
+			f.Write( ssprintf("#BGCHANGES%d:", b+1) );
 
 		FOREACH_CONST( BackgroundChange, out.GetBackgroundChanges(b), bgc )
 			f.PutLine( BackgroundChangeToString(*bgc) );