tests `update_login_attempts` done

fixed strtotime params in `update_login_attempts`
changed config var `update_last_login_attempt` to true,

application/config/aauth.php

@@ -112,7 +112,7 @@ $config_aauth["default"] = array(
 
 	'max_login_attempt'              => 10,
 	'max_login_attempt_per_minutes'  => 5,
-	'update_last_login_attempt'      => false,
+	'update_last_login_attempt'      => true,
 
 	'login_with_name'                => false,
 

application/libraries/Aauth.php

@@ -639,7 +639,8 @@ class Aauth {
 
 		$data = array();
 
-		if (strtotime($row->last_login_attempt) > strtotime("-"+$this->config_vars['max_login_attempt_per_minutes']+" minutes")) {
+		$minutes = $this->config_vars['max_login_attempt_per_minutes'];
+		if (strtotime($row->last_login_attempt) > strtotime("-$minutes minutes")) {
 			$data['login_attempts'] = $row->login_attempts + 1;
 
 			if($this->config_vars['update_last_login_attempt']){