Add label_delta to parallel IO too

src/parallel_io.c

@@ -850,8 +850,12 @@ void prepare_file(struct engine* e, const char* baseName, long long N_total[6],
 
   /* HDF5 File name */
   char fileName[FILENAME_BUFFER_SIZE];
-  snprintf(fileName, FILENAME_BUFFER_SIZE, "%s_%04i.hdf5", baseName,
-           e->snapshot_output_count);
+  if (e->snapshot_label_delta == 1)
+    snprintf(fileName, FILENAME_BUFFER_SIZE, "%s_%04i.hdf5", baseName,
+             e->snapshot_output_count);
+  else
+    snprintf(fileName, FILENAME_BUFFER_SIZE, "%s_%06i.hdf5", baseName,
+             e->snapshot_output_count * e->snapshot_label_delta);
 
   /* Open HDF5 file with the chosen parameters */
   hid_t h_file = H5Fcreate(fileName, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);