Tl deinterlace fix

Dear Joker developers,

This pull request addresses two issues related to deinterlacing:

- first, the deinterlace setting was not properly applied when opening the video after the doc,
- second, the deinterlace variable in PhVideoEngine was not initialized, so its value was undetermined and was actually set to true on Windows, whereas it is expected to be false (given what I found in the deinterlace test in VideoTest).

Thanks for your attention!