cascading behaviors

If you want to add a behavior to a behavior, you (depending on your template) can get an error message telling you, that the _table property is not an object.

This happens, as actAs() method of Record_Abstract does first the $tpl->setUp() call and then the $tpl->setTableDefnition(), as for the cascading templates - which are using Record_Generator - the $child->setTableDefinition() is called before $child->setUp() in method buildChildDefinitions(). Switching those two lines fixes the error and has, as far we can see (having it in our production system for quite a while now) no side effects besides fixing the error.