n_con fix (#371)

Co-authored-by: Kun Gao <Kun.Gao@noaa.gov>

model/dyn_core.F90

@@ -293,7 +293,7 @@ subroutine dyn_core(npx, npy, npz, ng, sphum, nq, bdt, n_map, n_split, zvir, cp,
 
     call init_ijk_mem(isd, ied, jsd, jed, npz, heat_source, 0.)
 
-    if ( flagstruct%convert_ke .or. flagstruct%vtdm4> 1.E-4 ) then
+    if ( flagstruct%convert_ke .or. (flagstruct%do_vort_damp .and. flagstruct%vtdm4> 1.E-4) ) then
          n_con = npz
     else
          if ( flagstruct%d2_bg_k1 < 1.E-3 ) then