We heavily rely on threading in Vulkan WSI. There's no way this is safe if XInitThreads() hasn't been called. Fortunately, this should never be the case since 2022 or so. Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/13530 Cc: mesa-stable Acked-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36120>