Yseasstat.cc: replaced asignment by field_copy().

src/Yseasstat.cc

@@ -134,11 +134,7 @@ Yseasstat(void *process)
           if (nsets == 0)
             {
               cdo_read_record(streamID1, rvars1);
-              if (lrange)
-                {
-                  vars2[seas][varID][levelID].nmiss = rvars1.nmiss;
-                  vars2[seas][varID][levelID].vec_d = rvars1.vec_d;
-                }
+              if (lrange) field_copy(rvars1, vars2[seas][varID][levelID]);
 
               if (rvars1.nmiss || !rsamp1.empty())
                 {