The delivered values in the coarse pixel size are 0 when coarse pixel
dispatch is disabled and that is screwing up our half pixel offset
adjustment.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: mesa-stable
Reviewed-by: Ivan Briano <ivan.briano@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36457>