Corrected typo in ana_smflux

[arango]

In line 406 of routine ROMS/Functional/ana_smflux.h the CPP-option UPWELLING was misspelled. This does not affect the solution. The Upwelling test case has been configured to have either East-West periodic (default) or North-South periodic boundary conditions:

EWperiodic(ng):   sustr=...   svstr=0
NSperiodic(ng):   sustr=0     svstr=...

So in ocean_upwelling.in, we can have:

          Lm == 41            ! Number of I-direction INTERIOR RHO-points, E-W
          Mm == 80            ! Number of J-direction INTERIOR RHO-points, E-W

!         Lm == 80            ! Number of I-direction INTERIOR RHO-points, N-S
!         Mm == 41            ! Number of J-direction INTERIOR RHO-points, N-S

This typo is in the North-South periodic case.

Many thanks to John Wilkin for bringing this to my attention.