858eb18952
GLX_SWAP_INTERVAL_EXT is always positive, GLX_LATE_SWAPS_TEAR_EXT is how
you tell whether the drawable is set to do it. This aligns us with the
spec and NVIDIA's GLX.
Closes: mesa/mesa#10193
Fixes: 5e9e457383 glx/dri3: Implement GLX_EXT_swap_control_tear
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31655>