Fix slow (90-100ms) sound shutdown.

stepmania/src/arch/Sound/RageSoundDriver_DSound.cpp

@@ -62,6 +62,12 @@ void RageSound_DSound::MixerThread()
 				;
 		}
 	}
+
+	/* I'm not sure why, but if we don't stop the stream now, then the thread will take
+	 * 90ms (our buffer size) longer to close. */
+	for(unsigned i = 0; i < stream_pool.size(); ++i)
+		if(stream_pool[i]->state != stream_pool[i]->INACTIVE)
+			stream_pool[i]->str_ds->Stop();
 }
 
 void RageSound_DSound::Update(float delta)

stepmania/src/arch/Sound/RageSoundDriver_DSound_Software.cpp

@@ -51,6 +51,10 @@ void RageSound_DSound_Software::MixerThread()
 		while(GetData())
 			;
 	}
+
+	/* I'm not sure why, but if we don't stop the stream now, then the thread will take
+	 * 90ms (our buffer size) longer to close. */
+	str_ds->Stop();
 }
 
 bool RageSound_DSound_Software::GetData()

stepmania/src/arch/Sound/RageSoundDriver_WaveOut.cpp

@@ -56,6 +56,8 @@ void RageSound_WaveOut::MixerThread()
 
 		WaitForSingleObject(sound_event, 10);
 	}
+
+	waveOutReset(wo);
 }
 
 bool RageSound_WaveOut::GetData()
@@ -209,6 +211,7 @@ RageSound_WaveOut::~RageSound_WaveOut()
 {
 	/* Signal the mixing thread to quit. */
 	shutdown = true;
+	SetEvent( sound_event );
 	LOG->Trace("Shutting down mixer thread ...");
 	MixingThread.Wait();
 	LOG->Trace("Mixer thread shut down.");