[PATCH 1/4] winegstreamer: Handle null transform in video IMediaObject::Flush().

[Conor McCarthy]

From: Conor McCarthy

Other methods for the video object return DMO_E_TYPE_NOT_SET if
wg_transform is null. A race condition in Nioh can result in Flush()
being called when the transform is not set.
---
 dlls/winegstreamer/video_decoder.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/dlls/winegstreamer/video_decoder.c b/dlls/winegstreamer/video_decoder.c
index 891066dac3b..ce716dd0004 100644
--- a/dlls/winegstreamer/video_decoder.c
+++ b/dlls/winegstreamer/video_decoder.c
@@ -1315,6 +1315,9 @@ static HRESULT WINAPI media_object_Flush(IMediaObject *iface)

TRACE("iface %p.\n", iface);

+    if (!decoder->wg_transform)
+        return DMO_E_TYPE_NOT_SET;
+
     if (FAILED(hr = wg_transform_flush(decoder->wg_transform)))
         return hr;