hdf5_msb

[svn-r9840] Purpose: Bug fix and new test

Description:  The functions for user-define floating-point type, like
H5Tset_fields, H5Tset_offset, H5Tset_precision, H5Tset_size, have some
minor bugs.  For error checking, the library didn't include offset value
somehow.

Solution:  Corrected those bugs.

Platforms tested: h5committest and fuss

Misc. update: