Bug fix when removing linear solution from a non-staggered grid
Bug fix when removing linear solution from a non-staggered grid

The linear look up table solution assumed u and v were on staggered grids, but
some input datasets (e.g. ERAi) do not provide u and v on staggered grids.

gutmann/icar,NCAR/icar,NCAR/icar,gutmann/icar,NCAR/icar,gutmann/icar