Trycatch sound stop, only stop if a sound has been played

Closes #3224

mono's impl of soundplayer is different, hence the need to be a little safer here.
bdd772531d/mcs/class/System/System.Media/SoundPlayer.cs (L255)
https://referencesource.microsoft.com/#System/sys/system/Media/SoundPlayer.cs,455

PKHeX.WinForms/Controls/Slots/CryPlayer.cs

@@ -26,7 +26,16 @@ public void PlayCry(ISpeciesForm pk, int format)
 #pragma warning restore CA1031 // Do not catch general exception types
         }
 
-        public void Stop() => Sounds.Stop();
+        public void Stop()
+        {
+            if (string.IsNullOrWhiteSpace(Sounds.SoundLocation))
+                return;
+
+            try { Sounds.Stop(); }
+#pragma warning disable CA1031 // Do not catch general exception types
+            catch { Debug.WriteLine("Failed to stop sound."); }
+#pragma warning restore CA1031 // Do not catch general exception types
+        }
 
         private static string GetCryPath(ISpeciesForm pk, string cryFolder, int format)
         {