hr_schedule - seems to depend on hr_payroll_extension

[Salton Massally]

line 1472 of hr_schedule.py reads:

 worked_hours = self.pool.get('hr.attendance').total_hours_on_day(cr, uid, ee.contract_id,
                                                                             dt.date(),
                                                                             punches_list=None,
                                                                             context=None)

'total_hours_on_day' is declared in hr_payroll_extension but that doesn't seem to be stated as a dependency.
Also simply stating it as a dependency will create cricular dependency as hr_payroll_extension has hr_schedule stated as a dependency