Description:
------------
SplFileObject::fgetss($allowable_tags = NULL) doesn't work at all.

The underlying fgetss that's called in the object needs a length :
"string fgetss ( resource $handle [, int $length [, string $allowable_tags ]] )"

A test is available on testfest.php.net :

http://testfest.php.net/index.php?do=details&task_id=126

Reproduce code:
---------------
$file = dirname(__FILE__) . '/foo.html';
file_put_contents($file, 'text 0<div class="tested">text 1</div>');
$handle = fopen($file, 'r');

$object = new SplFileObject($file);
var_dump($object->fgetss());
var_dump(fgetss($handle));

Expected result:
----------------
string(12) "text 0text 1"
string(12) "text 0text 1"


Actual result:
--------------
Warning: fgetss(): Length parameter must be greater than 0 in /Users/perrick/Desktop/testfest/spl_fileobject_fgetss_basic.php on line 7

string(12) "text 0text 1"