Fix ALException crash maybe

RedBookPlayer/MainWindow.xaml.cs

@@ -89,7 +89,7 @@ namespace RedBookPlayer
 
             this.Closing += (e, f) =>
             {
-                PlayerView.Player.Shutdown();
+                PlayerView.Player.Stop();
             };
         }
     }

RedBookPlayer/Player.cs

@@ -433,12 +433,6 @@ namespace RedBookPlayer
         {
             HasPreEmphasis = false;
         }
-
-        public void Shutdown()
-        {
-            soundOut?.Stop();
-            source?.Stop();
-        }
     }
 
     public class PlayerSource : IWaveSource

RedBookPlayer/PlayerView.xaml.cs

@@ -51,7 +51,7 @@ namespace RedBookPlayer
                 filter.Open(path);
                 image.Open(filter);
 
-                Player?.Shutdown();
+                Player?.Stop();
                 Player = new Player();
                 Player.Init(image, App.Settings.AutoPlay);
             });