hdf5

[svn-r12705] Description:
    Fix file handle destroy routine to not attempt to flush out partially
initialized file handles (when opening a file fails).

Tested on:  (until they finished testing, this time... :-)
    FreeBSD/32 4.11 (sleipnir) w/threadsafe
    Linux/64 2.4 (mir) w/1.6 compat
    Linux/32 2.4 (heping) w/FORTRAN & C++
    Mac OSX/32 10.4.8 (amazon)