Unboxing fails if a NULL handle is passed in, triggering an abort.
However for vkCmdBeginTransformFeedbackEXT, this is perfectly
valid:
"For each element of pCounterBuffers that is VK_NULL_HANDLE,
transform feedback will start capturing vertex data to byte zero
in the corresponding bound transform feedback buffer."
Reviewed-by: Aaron Ruby <aruby@blackberry.com>
Acked-by: Yonggang Luo <luoyonggang@gmail.com>
Acked-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27246>
Gurchetan Singh
a3f888d089