php8 fix

includes/config.plugin.php

@@ -1,4 +1,5 @@
 <?php
+global $load_client;
 /**
  * This file is the config file for this plugin
  *
@@ -33,5 +34,4 @@ try {
     new cSmartyFrontend(cRegistry::getConfig(), cRegistry::getClientConfig(cRegistry::getClientId()), true);
 } catch (Exception $e) {
     cWarning($e->getFile(), $e->getLine(), $e->getMessage());
-}
-?>
+}