fix res.partner.title handling in Internetmarke Address Generation

We don't want to try to print the object, but the abbreviated version
of the title

models/dp_delivery_carrier.py

@@ -68,7 +68,10 @@ class DPDeliveryCarrier(models.Model):
                 person = None
                 if partner.name:
                     (first, last) = split_first_lastname(partner.name)
-                    person = im.build_pers_name(first=first, last=last, title=partner.title)
+                    title = None
+                    if partner.title and partner.title.shortcut:
+                        title = partner.title.shortcut
+                    person = im.build_pers_name(first=first, last=last, title=title)
                 return im.build_comp_addr(company = partner.parent_id.name,
                                           address = addr,
                                           person = person)