Remove unused parameters.

OpenRA.Platforms.Default/DefaultPlatform.cs

@@ -30,7 +30,7 @@ namespace OpenRA.Platforms.Default
 			catch (InvalidOperationException e)
 			{
 				Log.Write("sound", "Failed to initialize OpenAL device. Error was {0}", e);
-				return new DummySoundEngine(device);
+				return new DummySoundEngine();
 			}
 		}
 

OpenRA.Platforms.Default/DummySoundEngine.cs

@@ -27,7 +27,7 @@ namespace OpenRA.Platforms.Default
 			return defaultDevices;
 		}
 
-		public DummySoundEngine(string deviceName) { }
+		public DummySoundEngine() { }
 
 		public ISoundSource AddSoundSourceFromMemory(byte[] data, int channels, int sampleBits, int sampleRate)
 		{

OpenRA.Platforms.Default/OpenAlSoundEngine.cs

@@ -363,7 +363,8 @@ namespace OpenRA.Platforms.Default
 
 		void Dispose(bool disposing)
 		{
-			StopAllSounds();
+			if (disposing)
+				StopAllSounds();
 
 			if (context != IntPtr.Zero)
 			{