Bug fix, sorta.
Description:
Revert change to H5Pget_data_transform() which changed len of buffer
returned to be inconsistent with H5Iget_name(), etc. We should discuss this
change and apply it to all the similar functions if we decide to change the
return value.
Platforms tested:
FreeBSD 4.10 (sleipnir)
Too minor to require h5committest
8d422da811