We need to track what the caller has given us for swap interval, and use
that to set the present mode at startup.
Fixes incorrect vblank syncing in apitrace's glretrace, which sets the
swap interval to 0 before the swapchain is made.
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17470>
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