nir/gather_info: fix partial masking of compact I/O with location_frac!=0
nir_lower_clip_cull_distance_arrays()
can create compact variables with location_frac!=0.
Closes: #4554 (closed)
nir_lower_clip_cull_distance_arrays()
can create compact variables with location_frac!=0.
Closes: #4554 (closed)