project : KeyError: 'company_id' when group by 'Company'.

Install project.

Go to Reporting -> Project -> Task Analysis and try to group by 'Company' without giving access right "Multi Companies".

Its gives the following traceback:

Traceback (most recent call last):
  File "/home/mdi/openerp/rdtools/server/trunk/openerp/osv/osv.py", line 121, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/home/mdi/openerp/rdtools/server/trunk/openerp/osv/osv.py", line 176, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/home/mdi/openerp/rdtools/server/trunk/openerp/osv/osv.py", line 164, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/home/mdi/openerp/rdtools/server/trunk/openerp/osv/orm.py", line 2556, in read_group
    if fget[f]['type'] in ('integer', 'float')
KeyError: 'company_id'

Thanks,
Divyesh