Avoid a small error in admin

diff --git a/mod/admin.php b/mod/admin.php
index 7799e64ab1a9fb1e468287a16835f5fe6be9a326..bbf786acb5fa80224c6c448d67f8ae74d94dd7dd 100644 (file)
--- a/mod/admin.php
+++ b/mod/admin.php
@@ -540,7 +540,7 @@ function admin_page_plugins(&$a){
                } 
                
                $admin_form="";
-               if (in_array($plugin, $a->plugins_admin)){
+               if (is_array($a->plugins_admin) && in_array($plugin, $a->plugins_admin)){
                        @require_once("addon/$plugin/$plugin.php");
                        $func = $plugin.'_plugin_admin';
                        $func($a, $admin_form);