Disable prescan for now in the previews

VocaluxeLib/Menu/SongMenu/CSongMenuFramework.cs

@@ -524,7 +524,7 @@ namespace VocaluxeLib.Menu.SongMenu
                     return;
 
                 //TODO: Using prescan here causes Vocaluxe to hang a bit on loading the song but we need the length below
-                int stream = CBase.Sound.Load(Path.Combine(song.Folder, song.MP3FileName), true, true);
+                int stream = CBase.Sound.Load(Path.Combine(song.Folder, song.MP3FileName), true);
 
                 float startposition = song.Preview.StartTime;
                 float length = CBase.Sound.GetLength(stream);