Description:
------------
PDO/PGSql segfaults with "getColumnMeta".

Reproduce code:
---------------
script:
<?php
$db = new pdo( 'pgsql:dbname=ezc' );
$stmt = $db->query( 'SELECT id AS other FROM query_test' );
$stmt->getColumnMeta( 0 );
?>

data (database name is "ezc") is here:
http://files.derickrethans.nl/ezc.dump.txt




Actual result:
--------------
Segfault, backtrace is @ http://files.derickrethans.nl/ezc.valgrind.txt