[PATCH v4 0/5] MR3572: mf: Make session_get_node_object() more robust.

[Zhiyi Zhang (＠zhiyi)]

It's possible that a state object pointer not in the topology node collection gets passed to
session_get_node_object(). Instead of returning the last node when the object is not found, we
should return a NULL so that the state of the last node is not changed by mistake.

--
  v4: mf/tests: Test IMFMediaSession::Start().
      mf/tests: Add a create_media_session() helper.
      mf: Add seeking support for IMFMediaSession::Start().
      mf: Add a session_flush_nodes() helper.
      mf: Make session_get_node_object() more robust.

https://gitlab.winehq.org/wine/wine/-/merge_requests/3572