filename	IN:	Name of the HDF file
	palette	OUT:	Buffer for the returned palette

	Purpose	Retrieves the next palette from file and stores it in the buffer palette.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
	Description	The palette buffer is assumed to be at least 768 bytes long. Successive calls to DFPgetpal retrieve the palettes in the sequence they are stored in the file.

	FORTRAN	integer function dpgpal(filename, palette)
		character*(*) filename. palette