[FIX] auth_signup: upon signup of new user, the company_id[s] of the corresponding partner must be used

The default was to use those of the template user,
which may not be correct in multi-company cases.

bzr revid: odo@openerp.com-20130415173901-sevyy27244m6iks0

addons/auth_signup/res_users.py

@@ -200,6 +200,9 @@ class res_users(osv.Model):
                     'partner_id': partner.id,
                     'email': values.get('email') or values.get('login'),
                 })
+                if partner.company_id:
+                    values['company_id'] = partner.company_id.id
+                    values['company_ids'] = [(6,0,[partner.company_id.id])]
                 self._signup_create_user(cr, uid, values, context=context)
         else:
             # no token, sign up an external user