va: va allocator close filedescriptor
As stated in va_drmcommon.h, "Backend driver will not close the file descriptor. Application should handle the release of the fd"
I saw these file descriptor properly closed in both:
- subprojects/gstreamer-vaapi/gst-libs/gst/vaapi/gstvaapiwindow_wayland.c:766
- subprojects/FFmpeg/libavutil/hwcontext_vaapi.c:1146
However, I don't see that in VA