vchoi_fork

[svn-r11145] Purpose:
    Bug fix

Description:
    If a named datatype is copied and the copy is used to create a dataset,
the dataset would inadvertantly refer to the original named datatype instead
of a local (possibly modified) copy of the named datatype.

Solution:
    Fixed datatype copying routine.

Platforms tested:
    FreeBSD 4.11 (sleipnir)
    Too minor to require h5committest