added smarty BC function get_template_vars()

relies on some additional plugins like serendipity_event_autotitle.php, serendipity_event_multilingual, serendipity_event_sidebarhider, serendipity_event_downloadmanager, serendipity_event_microformats and possibly also more plugins by custom developers.

include/serendipity_smarty_class.inc.php

@@ -1,5 +1,5 @@
 <?php 
-// (experimental) serendipity_smarty_class.inc.php 2013-01-21 17:14 Ian
+// serendipity_smarty_class.inc.php 2013-01-24 Ian
             
 // define secure_dir and trusted_dirs for Serendipity_Smarty_Security_Policy class.
 @define('S9Y_TEMPLATE_FALLBACK',    $serendipity['serendipityPath'] . $serendipity['templatePath'] . 'default');
@@ -370,6 +370,17 @@ class Serendipity_Smarty extends Smarty
         $this->assignByRef($tpl_var, $value);
     }
 
+    /**
+     * Returns an array containing template variables
+     *
+     * @param string $name
+     * @return array
+     */
+    public function get_template_vars($name=null)
+    {
+        return $this->getTemplateVars($name);
+    }
+
     public static function test() 
       { 
         var_dump(get_called_class());