winepulse: Set name of internal threads.

dlls/winepulse.drv/mmdevdrv.c

@@ -234,6 +234,7 @@ static DWORD CALLBACK pulse_mainloop_thread(void *event)
 {
     struct main_loop_params params;
     params.event = event;
+    SetThreadDescription(GetCurrentThread(), L"winepulse_mainloop");
     pulse_call(main_loop, &params);
     return 0;
 }
@@ -359,6 +360,7 @@ static DWORD WINAPI pulse_timer_cb(void *user)
     struct timer_loop_params params;
     ACImpl *This = user;
     params.stream = This->pulse_stream;
+    SetThreadDescription(GetCurrentThread(), L"winepulse_timer_loop");
     pulse_call(timer_loop, &params);
     return 0;
 }