[TASK] Make the author id optional as a parameter

Classes/Controller/NewsByAuthorController.php

@@ -45,7 +45,7 @@ class NewsByAuthorController extends AbstractController {
 	 * @throws \InvalidArgumentException
 	 * @throws \TYPO3\CMS\Extbase\Persistence\Exception\InvalidQueryException
 	 */
-	public function listAction($authorId) {
+	public function listAction($authorId = 0) {
 		if ($authorId) {
 			$newsAuthorsIds[] = $authorId;
 		} else {