dsound: Set name of internal threads.

dlls/dsound/capture.c

@@ -951,6 +951,8 @@ static DWORD WINAPI DSOUND_capture_thread(void *user)
     DWORD ret, wait_ms;
     REFERENCE_TIME period;
 
+    SetThreadDescription(GetCurrentThread(), L"wine_dsound_capture");
+
     hr = IAudioClient_GetDevicePeriod(buffer->device->client, &period, NULL);
     if(FAILED(hr)){
         WARN("GetDevicePeriod failed: %08lx\n", hr);

dlls/dsound/mixer.c

@@ -783,6 +783,7 @@ DWORD CALLBACK DSOUND_mixthread(void *p)
 {
 	DirectSoundDevice *dev = p;
 	TRACE("(%p)\n", dev);
+	SetThreadDescription(GetCurrentThread(), L"wine_dsound_mixer");
 
 	while (dev->ref) {
 		DWORD ret;