winegstreamer/media_source: Close bytestream in ::Shutdown.

dlls/mfplat/tests/mfplat.c

@@ -1080,7 +1080,6 @@ static void test_source_resolver(void)
     hr = IMFMediaSource_Shutdown(mediasource);
     ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
 
-    todo_wine
     ok(bytestream_closed, "Missing IMFByteStream::Close call\n");
 
     hr = IMFMediaSource_CreatePresentationDescriptor(mediasource, NULL);

dlls/winegstreamer/media_source.c

@@ -1344,6 +1344,7 @@ static HRESULT WINAPI media_source_Shutdown(IMFMediaSource *iface)
 
     IMFPresentationDescriptor_Release(source->pres_desc);
     IMFMediaEventQueue_Shutdown(source->event_queue);
+    IMFByteStream_Close(source->byte_stream);
     IMFByteStream_Release(source->byte_stream);
 
     for (i = 0; i < source->stream_count; i++)