regridding FV3 c540/CONUS refinement factor gives isolated zeros

[JulioTBacmeister]

When a refinement factor on the c540/CONUS SCRIP file is regridded to the nc3000 grid in cube_to_target.F90, isolated stripes of ZERO are produced. The field on the SCRIP is fine, i.e., minimum value=1.0.

[JulioTBacmeister]

The NASA scrip file works fine. So issue closed unless we want to probe why the scrip generated here has a problem.