FIXED: Pledge api does not filter on contact_id

I have fixed the bug, here is a diff of CRM/Pledge/BAO/Query.php

397a398,406
>
> case 'pledge_contact_id':
> $query->_where[$grouping][] = CRM_Contact_BAO_Query::buildClause("civicrm_pledge.contact_id",
> $op,
> $value,
> "Integer"
> );
> $query->_tables['civicrm_pledge'] = $query->whereTables['civicrm_pledge'] = 1;
> return;