hdf5_msb

Merge pull request #2101 in HDFFV/hdf5 from ~NFORTNE2/hdf5_naf:tmp_112_5 to hdf5_1_12

* commit '47f6c293a78aaa92c80b327795b1f1a242ea30a5':
  Fix issues with using H5Pget_fill_value() with file datatypes retrieved from H5VLget_file_type().