Add src/H5Oalloc.c file forgotten in previous object header checkin
Break out more object header routines into separate file (debugging routines
this time).
Fix "//" style comment in recent ISOHM source changes.
Fix 'size_t' vs. 'unsigned' problem (visible in 64-bit testing) in recent
ISOHM test changes.
Tested on:
FreeBSD/32 4.11 (sleipnir)
Linux/32 2.4 (heping)
Linux/64 2.4 (mir)
version and size information into the superblock to eliminate a read when
loading it.
This is a file format change, and hopefully the last one (knock on wood).
Tested on kagiso and Windows (mostly just a SOHM change).