The documentation is wrong for get() in couchbase-api.php

I just discovered this while fixing a bug in Basement.

The $cas variable callback is not working on get() but works on getMulti().

Simple example:

Works:
$client->set("foo", "bar");
$cas = null;
var_dump($client->getMulti(array("foo"), $cas));
var_dump($cas);

array(1) {
  ["foo"]=>
  string(3) "bar"
}
array(1) {
  ["foo"]=>
  string(20) "11699665754086047744"
}

Doesn't work:
$client->set("foo", "bar");
$cas = null;
var_dump($client->get("foo", $cas));
var_dump($cas);

string(3) "bar"
NULL

The doc gets returned properly, but the cas value is not set. Also, when you set $cas to "" or false (not null), then it complains with a dubios error:
Warning: Couchbase::get() expects parameter 2 to be a valid callback, no array or string given in /Users/michael/Webserver/basement-test/index.php on line 10
Note that its a warning and not an exception on the OOP interface!