AUTO LOGOUT EXTENDED：Fix PHP Noticed / Errors

class/class.al_ext.php

@@ -16,7 +16,9 @@ if ( ! class_exists( 'AL_EXT' ) ) {
 
 		public function __construct() {
 			$this->options = get_option( '_al_ext' );
-
+			if(!$this->options){
+				return;
+			}
 			if ( $this->options['type'] == 1 ) {
 				$this->normal_expire();
 			} elseif ( $this->options['type'] == 2 ) {