message: Fix uninitialised value found by valgrind
diff: @@ -108,6 +108,7 @@ DataCollection::DataCollection(const std::string& collection_name, Mesh *mesh_)
  precision = precision_default;
  pad_digits_cycle = pad_digits_rank = pad_digits_default;
  format = SERIAL_FORMAT; // use serial mesh format
  + compression = false;
  error = NO_ERROR;
  }
  