set min deflate size of data variables to 16.

ChangeLog

@@ -5,6 +5,7 @@
 2017-03-14  Uwe Schulzweida
 
 	* set chunk size of time axis to 512
+	* set min deflate size of data variables to 16
 	* streamOpenAppend: set defmiss = true (Needed for NetCDF4)
 
 2017-03-08  Uwe Schulzweida

src/cdf_write.c

@@ -350,7 +350,7 @@ int cdfDefVar(stream_t *streamptr, int varID)
   vlistInqVarDimorder(vlistID, varID, &dimorder);
 
   size_t gridsize  = (size_t)(gridInqSize(gridID));
-  bool lchunk = (gridsize > 1);
+  bool lchunk = (gridsize >= 16);
   int gridtype  = gridInqType(gridID);
   int gridindex = nc_grid_index(streamptr, gridID);
   if ( gridtype != GRID_TRAJECTORY )