[FIX] account: analytic account in write-off

The analytic account of the write-off move is not copied on the line
when doing a reconciliation.

opw-688635

addons/account/models/account_move.py

@@ -898,6 +898,8 @@ def _create_writeoff(self, vals):
             vals['date'] = self._context.get('date_p') or time.strftime('%Y-%m-%d')
         if 'name' not in vals:
             vals['name'] = self._context.get('comment') or _('Write-Off')
+        if 'analytic_account_id' not in vals:
+            vals['analytic_account_id'] = self.env.context.get('analytic_id', False)
         #compute the writeoff amount if not given
         if 'credit' not in vals and 'debit' not in vals:
             amount = sum([r.amount_residual for r in self])