winealsa: Fix WoW64 failure when calling get_position().

dlls/winealsa.drv/alsa.c

@@ -2735,6 +2735,7 @@ static NTSTATUS alsa_wow64_get_position(void *args)
     struct
     {
         stream_handle stream;
+        BOOL device;
         HRESULT result;
         PTR32 pos;
         PTR32 qpctime;
@@ -2742,6 +2743,7 @@ static NTSTATUS alsa_wow64_get_position(void *args)
     struct get_position_params params =
     {
         .stream = params32->stream,
+        .device = params32->device,
         .pos = ULongToPtr(params32->pos),
         .qpctime = ULongToPtr(params32->qpctime)
     };

dlls/winealsa.drv/mmdevdrv.c

@@ -1482,6 +1482,7 @@ static HRESULT WINAPI AudioClock_GetPosition(IAudioClock *iface, UINT64 *pos,
         return E_POINTER;
 
     params.stream = This->stream;
+    params.device = FALSE;
     params.pos = pos;
     params.qpctime = qpctime;