wsi/x11: Fix potential deadlock in present ID.

wsi/x11: Fix potential deadlock in present ID.

If we observe IDLE before COMPLETE, another queued image may have
presented with present ID 0 which would break the check fixed in this
commit. The original fix for present_id / signal_present_id split
forgot to take this into account.

Fixes: 32f7ff2c204b ("Fix present ID signal when IDLE comes before
COMPLETE").

Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Reviewed-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25178>