BUG #5054: PDO -> Query returns "" from Boolean type field, if it has false value.

The following bug has been logged online:

Bug reference:      5054
Logged by:          Yujin
Email address:      aloudnoise@mail.ru
PostgreSQL version: 8.3
Operating system:   windows XP SP3
Description:        PDO -> Query returns "" from Boolean type field, if  it
has false value.
Details:

When i get query from table with bolean type fields, that have false value ,
function PDO -> fetch  return that fields with not "0" value , but empty
string.