[TASK] Fix default value for gender

Classes/Domain/Model/JobApplication.php

@@ -59,7 +59,7 @@ class JobApplication extends AbstractEntity {
 	 * @var string $gender
 	 * @TYPO3\CMS\Extbase\Annotation\Validate("NotEmpty")
 	 */
-	protected $gender = 0;
+	protected $gender = '';
 
 	/**
 	 * @var string $firstName