Description:
------------
pdo_dblib is not returning the correct string length after converting the data.

Test script:
---------------
$row = $stmt->fetch(PDO::FETCH_ASSOC);
var_dump($row);


Expected result:
----------------
  array(2) {
    ["id"]=>
    string(2) "13"
    ["flag"]=>
    string(1) "0"
  }


Actual result:
--------------
  array(2) {
    ["id"]=>
    string(40) "13                                     "
    ["flag"]=>
    string(40) "0                                      "
  }