Wrong direction for variable transfer between subroutines

[oyvindseland]

The variable fdot in subroutine cfint2, module oslo_aero_dust_sediment.F90
is defined as intent(out) even though it is used for calculations within cfint2
In the twinned subroutine dust_sediment_mod the variable has not defined direction. The NlorESM2.3 version of the code has the same problem.