add hattr_name and hattr_data as defaults to write_hattr method

[fherwig]

hattr_name = [	"codev", "modname", "mini", "zini", "rotini", "overini", "age_unit",
		"mass_unit", "radius_unit", "rho_unit", "temperature_unit",
		"dcoeff_unit","firstcycle"]
hattr_data = [	'codev1', 'modname', 1., 0.02, 0., 0., 1., 1.,
		1., 1., 1., 1.,cycles[0]]
file_sewrite.write_hattr(hattr_name, hattr_data)