Description:
------------
This is just as described here:
http://bugs.php.net/bug.php?id=43279

Variables passed into the $params array of pg_send_query_params() are converted to strings as if they were passed by reference.

Reproduce code:
---------------
$pg = pg_connect();
$int = null;
$int2 = 99;

echo '$int = '.var_export($int, true).'<br />';
echo '$int2 = '.var_export($int2, true).'<br /><br />';

$q = 'INSERT INTO val (val_int, val_int2) VALUES($1, $2)';
pg_send_query_params($pg, $q, array($int,$int2));
$result = pg_get_result($pg);

echo '$int = '.var_export($int, true).'<br />';
echo '$int2 = '.var_export($int2, true).'<br /><br />';

Expected result:
----------------
$int = NULL
$int2 = 99

$int = NULL
$int2 = 99

Actual result:
--------------
$int = NULL
$int2 = 99

$int = ''
$int2 = '99'