hdf5

Merging in latest from upstream (HDFFV/hdf5:refs/heads/hdf5_1_10)

* commit 'f4324635e142eacf7c4a72224038152ea73d1139':
  A fix in the cleaning up code for datatype when datatype initialization via H5D__init_type() fails. The code to fix the problem is the same as what is done in H5D__open_oid().