Manage an empty query

Hi,

I got a model :

PHP Code:

           public function biens_location()
            {
                        $query = $this->db->select('')
                        ->from('biens')
                        ->where('actif', '1')
                        ->where('rent','1')
                        ->get();
                        if($query->num_rows()!==0)
                        {
                                    return $query->result();
                        }
                        else
                        {
                                    return FALSE;
                        }
            } 


and a controller :

PHP Code:

           public function location()
            {
                        $this->data['biens'] = $this->Biens_model->biens_location();
                        $this->data['title'] = "Location";
                        $this->render('location_view');
            } 


and my view :

PHP Code:

foreach ($biens as $bien)
{
...
} 


Everything is Ok, but in the case there is no result I got an error so I would like to check results and show a message on the page something like "There are no properties for rent".
How can I achieve this ?