Fix method signature for CakePHP 2.4.1 to fix E_STRICT warnings

See: http://bakery.cakephp.org/articles/markstory/2013/09/15/cakephp_2_4_1_released

Method signatures in CakePHP's ModelBehavior class were evidently fixed in 2.4.1. These three were the only ones showing E_STRICT messages for me.

Suppose you may also want to reconsider using `$options` variable in the foreach in this case. But the code doesn't break, so not a big deal, just confusing.