nir_lower_clip_cull_distance_arrays() can create compact variables with
location_frac!=0.
Fixes: cc7a187411 ("nir/gather_info: implement partial masking of struct and compact I/O")
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/4554
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10002>