v7 Share button raises TypeError exception "has_share() takes at least 4 arguments (4 given)"

[Daniel Reis]

Found in version Version 7.0-20130122-001415, with CRM and Share modules.

Steps to reproduce :
- go to Sales > Customers and open Agrolait
- at Customers / Agrolait click on the More button > Share
- at the "Share your documents" dialog, select "Sharing method" as "Direct link or embed code" and click "Share"

Server Traceback (most recent call last):
  File "/home/erp_user/openerp/build-oe/v7/server/openerp/addons/web/session.py", line 90, in send
    return openerp.netsvc.dispatch_rpc(service_name, method, args)
  File "/home/erp_user/openerp/build-oe/v7/server/openerp/netsvc.py", line 289, in dispatch_rpc
    result = ExportService.getService(service_name).dispatch(method, params)
  File "/home/erp_user/openerp/build-oe/v7/server/openerp/service/web_services.py", line 614, in dispatch
    res = fn(db, uid, *params)
  File "/home/erp_user/openerp/build-oe/v7/server/openerp/osv/osv.py", line 169, in execute_kw
    return self.execute(db, uid, obj, method, *args, **kw or {})
  File "/home/erp_user/openerp/build-oe/v7/server/openerp/osv/osv.py", line 123, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/home/erp_user/openerp/build-oe/v7/server/openerp/osv/osv.py", line 179, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/home/erp_user/openerp/build-oe/v7/server/openerp/osv/osv.py", line 166, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/home/erp_user/openerp/build-oe/v7/server/openerp/addons/share/wizard/share_wizard.py", line 696, in go_step_2
    self._check_preconditions(cr, uid, wizard_data, context=context)
  File "/home/erp_user/openerp/build-oe/v7/server/openerp/addons/portal/wizard/share_wizard.py", line 56, in _check_preconditions
    return super(share_wizard_portal, self)._check_preconditions(cr, uid, wizard_data, context=context)
  File "/home/erp_user/openerp/build-oe/v7/server/openerp/addons/share/wizard/share_wizard.py", line 663, in _check_preconditions
    self._assert(self.has_share(cr, uid, context=context),
TypeError: has_share() takes at least 4 arguments (4 given)