vdata_id	IN:	Vdata identifier returned by VSattach
	vdata_size	OUT:	Size of the vdata record

	Purpose	Retrieves the size of a record in a vdata.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
	Description	VSQueryvsize retrieves the size, in bytes, of a record in the vdata identified by the parameter vdata_id into the parameter vdata_size. The returned size value is machine dependent.

	FORTRAN	integer function vsqfvsiz(vdata_id, vdata_size)
		integer vdata_id, vdata_size