hdf5_ep

[svn-r17389] Description:
	Bring r17388 from trunk to 1.8 branch:

	Correct error in freespace test which was relying on free space section
to be valid after the library had taken ownership of it (and therefore could
free it).

	Also correct some checking for return values of H5FS internal routines

Tested on:
       FreeBSD/32 6.3 (duty) in debug mode
	(h5committest performed on trunk)