- remove 1 local array in original version (SOLVE_DIAGONAL_LOWMEMORY) - replace division with multiplication by inverse (similar to original version)
- remove 1 local array in original version (SOLVE_DIAGONAL_LOWMEMORY)
- replace division with multiplication by inverse (similar to original version)

altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h