[FIX] purchase_requisition: correct search domain

bug introduced by ef16266ad6

Task : 2210230

closes odoo/odoo#47400

Signed-off-by: Simon Lejeune (sle) <sle@openerp.com>

addons/purchase_requisition/models/purchase_requisition.py

@@ -85,7 +85,7 @@ class PurchaseRequisition(models.Model):
             ('vendor_id', '=', self.vendor_id.id),
             ('state', '=', 'ongoing'),
             ('type_id.quantity_copy', '=', 'none'),
-            ('company_id', '=', self.company_id),
+            ('company_id', '=', self.company_id.id),
         ])
         if any(requisitions):
             title = _("Warning for %s") % self.vendor_id.name