vchoi_fork

[svn-r12933] Description:
    Finish migrating "object copy" supporting routines into src/H5Ocopy.

    Clean up a few minor errors _en passant_

Tested on:
    FreeBSD/32 4.11 (sleipnir)
    Linux/32 2.4 (heping)
    Linux/64 2.4 (mir)