vchoi_fork

[svn-r4732] 
Purpose:
	Bug Fix
Description:
	Committing the changes in the MPI/IO stuff so that parallel HDF5
	will work on HP-UX. It seems that on HP-UX, the MPI_Status variable
	needs to be initialized to 0 for it to work (i.e., in some other MPI
	calls, if there's garbage in the MPI_Status variable, then it will
	barf).
Solution:
	Initialized to 0.
Platforms tested:
	HP-UX parallel, Linux.