ALSA: Don't ask the client for more data when the device is closing.

mini_al.h

@@ -1603,6 +1603,11 @@ mal_bool32 mal_device_write__alsa(mal_device* pDevice)
 				return MAL_FALSE;
 			}
             
+            // Don't bother asking the client for more audio data if we're just stopping the device anyway.
+            if (pDevice->alsa.breakFromMainLoop) {
+                return MAL_FALSE;
+            }
+
             mal_device__read_samples_from_client(pDevice, framesAvailable * pDevice->channels, pBuffer);
         
 			snd_pcm_sframes_t framesWritten = snd_pcm_writei(pDevice->alsa.pPCM, pDevice->alsa.pIntermediaryBuffer, framesAvailable);