Fixed potential memory leak

Fixes #1739

diff --git a/wcfsetup/install/files/js/WCF.js b/wcfsetup/install/files/js/WCF.js
index 5edb04132e5e783d7f1d4070cefe7bad793d4126..3be6081267e48aff822e1d8003675690b8bbfbfc 100755 (executable)
--- a/wcfsetup/install/files/js/WCF.js
+++ b/wcfsetup/install/files/js/WCF.js
@@ -6382,7 +6382,7 @@ WCF.System.FlexibleMenu = {
        _registerTabMenus: function() {
                // register tab menus
                $('.tabMenuContainer:not(.jsFlexibleMenuEnabled)').each(function(index, tabMenuContainer) {
-                       var $navigation = $(tabMenuContainer).children('nav');
+                       var $navigation = $(tabMenuContainer).addClass('jsFlexibleMenuEnabled').children('nav');
                        if ($navigation.length && $navigation.find('> ul:eq(0) > li').length) {
                                WCF.System.FlexibleMenu.registerMenu($navigation.wcfIdentify());
                        }