Call to isActionMapped during Controller.initialize event crashes controller bake

[asgraf]

How to reproduce:

1. For example add following line at the end of your AppController::initialize()

debug($this->Crud->isActionMapped());

2. Bake any controller (confirm that you want to override controller if already exists)
3. Crash during bake:

[TypeError] Cake\Utility\Inflector::variable(): Argument #1 ($string) must be of type string, null given, called in /application/vendor/friendsofcake/crud/src/Controller/Component/CrudComponent.php on line 430 in /application/vendor/cakephp/cakephp/src/Utility/Inflector.php on line 511

[ADmad]

The default crud action is set in CrudComponent::initialize() which gets run after Controller::initialize(). While we could fix the exception calling isActionMapped() so early without an argument will never yield the correct result.