Launcher error messageboxes, more easily controllable & better looking swimming, oxygen tank bugfixes, loading screen coroutine bugfix

Subsurface/Source/Sounds/AmbientSoundManager.cs

@@ -273,7 +273,7 @@ namespace Subsurface
             {
                 if (i == selectedSound)
                 {
-                    Debug.WriteLine(s.sound.Play(1.0f, 2000.0f, position));
+                    s.sound.Play(1.0f, 2000.0f, position);
                     Debug.WriteLine("playing: " + s.sound);
                     return;
                 }

Subsurface/Source/Sounds/Sound.cs

@@ -234,11 +234,11 @@ namespace Subsurface
 
             loadedSounds.Remove(this);
 
-            System.Diagnostics.Debug.WriteLine("Removing sound " + filePath + " (buffer id" + AlBufferId + ")");
-
             if (alSourceId>0 && SoundManager.IsPlaying(alSourceId))
             {
+                ALHelper.Check();
                 SoundManager.Stop(alSourceId);
+                ALHelper.Check();
             }
 
             foreach (Sound s in loadedSounds)
@@ -246,6 +246,8 @@ namespace Subsurface
                 if (s.oggSound == oggSound) return;
             }
 
+            System.Diagnostics.Debug.WriteLine("Removing sound " + filePath + " (buffer id" + AlBufferId + ")");
+
             SoundManager.ClearAlSource(AlBufferId);
             oggSound.Dispose();
         }

Subsurface/Source/Sounds/SoundManager.cs

@@ -218,7 +218,6 @@ namespace Subsurface.Sounds
             if (AL.GetSourceState(alSources[sourceIndex]) != ALSourceState.Paused)
                 return;
 
-            Debug.WriteLine("sourceplay");
             AL.SourcePlay(alSources[sourceIndex]);
             ALHelper.Check();
         }