COMPMID-1045 - Fix shape_to_valid_region_gaussian_pyramid_half()

The utility function shape_to_valid_region_gaussian_pyramid_half() did not
calculate correctly the valid regions for levels above 1

Change-Id: Id818efe3b95ce4e0ba1bc57f091d912357a8134a
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/127380
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Sanghoon Lee <sanghoon.lee@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
3 files changed