vdata_id	IN:	Vdata identifier returned by VSattach
	vdata_name	OUT:	Vdata name

	Purpose	Retrieves the name of a vdata.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
	Description	VSgetname retrieves the name of the vdata identified by the parameter vdata_id into the buffer vdata_name.
		The user must allocate the memory space for the buffer vdata_name before calling VSgetname. If the vdata does not have a name, a null string is returned in the parameter vdata_name . The maximum length of a vdata name is defined by VSNAMELENMAX (or 64)

	FORTRAN	integer function vsfgnam(vdata_id, vdata_name)
		integer vdata_id
		character*(*) vdata_name