Minor array treatment improvement

main/inc/lib/main_api.lib.php

@@ -1700,7 +1700,7 @@ class api_failure {
     function get_last_failure() {
         global $api_failureList;
         if (count($api_failureList) == 0) { return ''; }
-        return $api_failureList[count($api_failureList) - 1];
+        return array_pop($api_failureList);
     }
 }
 
@@ -5802,4 +5802,4 @@ function block_course_item_locked_by_gradebook($item_id, $link_type, $course_cod
         $message = Display::return_message(get_lang('ResourceLockedByGradebook'), 'warning');
         api_not_allowed(true, $message);
     }    
-}
+}