hdf5_ep

[svn-r511] Changes since 19980715
----------------------

./src/H5Flow.c
./src/H5Fprivate.h
./src/H5Fsplit.c
	Changed the allocation size request from `size_t' to `hsize_t'
	because it was overflowing for the `big' test.

./src/H5detect.c
	If `long double' and `double' are the same size then we define
	H5T_NATIVE_LDOUBLE to be the same as H5T_NATIVE_DOUBLE.
	Similarly for `long' vs. `long long' and `unsigned long' vs.
	`unsigned long long'.

./test/Makefile.in
	Added `big' to the list of tests to normally run.

./test/big.c
	Added a check to see if the file system supports holes and if
	it doesn't then the test is skipped.