output: ra-add init of Dn,Dun,Dvn accidently removed by 257e2e8c

src/3d/variables_3d.F90

@@ -193,7 +193,6 @@
 #endif
 
    hn = _ZERO_ ; hun = _ZERO_ ; hvn = _ZERO_
-
    uu = _ZERO_ ; vv = _ZERO_ ; ww = _ZERO_
 
 #ifdef _MOMENTUM_TERMS_
@@ -203,6 +202,7 @@
    cor_v = _ZERO_ ; epg_v = _ZERO_ ; ipg_v = _ZERO_
 #endif
    ssen = _ZERO_ ; ssun = _ZERO_ ; ssvn = _ZERO_
+   Dn = _ZERO_ ; Dun = _ZERO_ ; Dvn = _ZERO_
    rru= _ZERO_ ; rrv= _ZERO_
    uuEx= _ZERO_ ; vvEx= _ZERO_
    tke=1.e-10 ; eps=1.e-10