Fix exception on shutdown

Improve error handling during shutdown

Vocaluxe/Base/CLog.cs

@@ -130,7 +130,7 @@ namespace Vocaluxe.Base
             _Initialized = true;
         }
 
-        public static void CloseAll()
+        public static void Close()
         {
             if (_Initialized)
             {

Vocaluxe/Base/ThemeSystem/CThemes.cs

@@ -57,7 +57,7 @@ namespace Vocaluxe.Base.ThemeSystem
 
         public static void Unload()
         {
-            foreach (CBaseTheme theme in _Themes)
+            foreach (CTheme theme in _Themes)
                 theme.Unload();
             CurrentThemes.Clear();
         }

Vocaluxe/Lib/Sound/Playback/CPlaybackBase.cs

@@ -117,7 +117,7 @@ namespace Vocaluxe.Lib.Sound.Playback
         {
             if (!_Initialized)
                 return -1;
-            IAudioStream stream = _CreateStream(_NextID, medium, loop);
+            IAudioStream stream = _CreateStream(_NextID++, medium, loop);
 
             if (stream.Open(prescan))
             {
@@ -127,7 +127,6 @@ namespace Vocaluxe.Lib.Sound.Playback
                     stream.VolumeMax = _GlobalVolume;
                     stream.SetOnCloseListener(this);
                     _Streams.Add(stream);
-                    _NextID++;
                     return stream.ID;
                 }
             }

Vocaluxe/Program.cs

@@ -279,8 +279,15 @@ namespace Vocaluxe
                 CRecord.Close();
                 CSound.Close();
                 CDraw.Close();
-                GC.Collect(); // Do a GC run here before we close logs to have finalizers run
-                CLog.CloseAll(); // Do this last, so we get all log entries!
+            }
+            catch (Exception e)
+            {
+                CLog.LogError("Error during shutdown!", false, false, e);
+            }
+            GC.Collect(); // Do a GC run here before we close logs to have finalizers run
+            try
+            {
+                CLog.Close(); // Do this last, so we get all log entries!
             }
             catch (Exception) {}
             Environment.Exit(Environment.ExitCode);