It doesn't leak - as a matter of fact, gle_pp is just a dummy var here. And although "w" was supported, we wouldn't remove it from the data sent through to ensureIndex. This causes no harm, but it's a bit useless. This code:

```
<?php
$m = new MongoClient;
$c = $m->test->php809;
$c->remove();
$c->ensureIndex(
	array('one' => 1, 'two' => 2),
	array('w' => 1)
);
?>
```

Creates this index:
```
{ "v" : 1, "key" : { "one" : NumberLong(1), "two" : NumberLong(2) }, "ns" : "test.php809", "w" : NumberLong(1), "name" : "one_1_two_-1" }
```

With the patch, it creates:
```
{ "v" : 1, "key" : { "one" : NumberLong(1), "two" : NumberLong(2) }, "ns" : "test.php809", "name" : "one_1_two_-1" }
```
(Notice the "w": NumberLong(1) is missing)