Re: [PATCH v2 0/3] MR9575: winegstreamer: Reject SetOutputType with a different number of channels.

[Elizabeth Figura (＠zfigura)]

```
+    if (IsEqualGUID(&decoder->input_type.formattype, &FORMAT_WaveFormatEx) &&
+            IsEqualGUID(&type->formattype, &FORMAT_WaveFormatEx))
+    {
+        WORD current_nchannels = ((WAVEFORMATEX *)decoder->input_type.pbFormat)->nChannels;
+        WORD incomming_nchannels = ((WAVEFORMATEX *)type->pbFormat)->nChannels;
+        if (current_nchannels != incomming_nchannels)
+            return DMO_E_TYPE_NOT_ACCEPTED;
+    }
```

That's a bit of an odd test, because as written it implies that using a different formattype is legal, which I would be surprised to find that it is.