- fix CPP comments (was giving warnings). - fix EXCH of uwind,vwind for CS-grid : it does change the results of   my cs32-grid test, but might have even larger impact on Lat-Lon-Cap grid.
- fix CPP comments (was giving warnings).
- fix EXCH of uwind,vwind for CS-grid : it does change the results of
  my cs32-grid test, but might have even larger impact on Lat-Lon-Cap grid.

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