Make dsnow non-optional

columnphysics/icepack_therm_vertical.F90

@@ -2248,6 +2248,7 @@ subroutine icepack_step_therm1(dt, ncat, nilyr, nslyr,    &
          meltt       , & ! top ice melt             (m/step-->cm/day)
          melts       , & ! snow melt                (m/step-->cm/day)
          meltb       , & ! basal ice melt           (m/step-->cm/day)
+         dsnow       , & ! change in snow depth     (m/step-->cm/day)
          mlt_onset   , & ! day of year that sfc melting begins
          frz_onset       ! day of year that freezing begins (congel or frazil)
 
@@ -2259,7 +2260,6 @@ subroutine icepack_step_therm1(dt, ncat, nilyr, nslyr,    &
          fswthru_vdf , & ! vis dif shortwave penetrating to ocean (W/m^2)
          fswthru_idr , & ! nir dir shortwave penetrating to ocean (W/m^2)
          fswthru_idf , & ! nir dif shortwave penetrating to ocean (W/m^2)
-         dsnow       , & ! change in snow depth     (m/step-->cm/day)
          fsloss          ! rate of snow loss to leads      (kg/m^2/s)
 
       real (kind=dbl_kind), intent(out), optional :: &