[FIX] hr_holidays: fix accrual for allocation leave

In the refactoring of hr_holidays in odoo/odoo@cf33b80aca81, there was a typo
in the loop, with the recordset self instead of the record allocation.

Fixes odoo#164259

closes odoo#164414

Signed-off-by: Sofie Gvaladze (sgv) <sgv@odoo.com>

addons/hr_holidays/models/hr_leave_allocation.py

@@ -463,7 +463,7 @@ def _process_accrual_plans(self, date_to=False, force_period=False, log=True):
             # even if the value doesn't change. This is the best performance atm.
             first_level = level_ids[0]
             first_level_start_date = allocation.date_from + get_timedelta(first_level.start_count, first_level.start_type)
-            leaves_taken = allocation.leaves_taken if first_level.added_value_type == "day" else allocation.leaves_taken / (self.employee_id.sudo().resource_id.calendar_id.hours_per_day or HOURS_PER_DAY)
+            leaves_taken = allocation.leaves_taken if first_level.added_value_type == "day" else allocation.leaves_taken / (allocation.employee_id.sudo().resource_id.calendar_id.hours_per_day or HOURS_PER_DAY)
             # first time the plan is run, initialize nextcall and take carryover / level transition into account
             if not allocation.nextcall:
                 # Accrual plan is not configured properly or has not started