[dokuwiki] Problem with script tag generation in TPL_METAHEADER_OUTPUT event

Hi.
    I propose the following patch, which corrects work of
_tpl_metaheaders_action function used by TPL_METAHEADER_OUTPUT event,
because self closed script tags is not correct.

    Simple example (from
http://www.dokuwiki.org/devel:event:tpl_metaheader_output):

   1.
      // Adding a JavaScript File
   2.
      $event->data["script"][] = array (
   3.
        "type" => "text/javascript",
   4.
        "src" => "lib/plugins/myplugin/javascript_library.js",
   5.
      );

it generates the following html code:

<script type="text/javascript" src="lib/plugins/myplugin/javascript_library.js" 
/>



--- dokuwiki/inc/template.php~  2009-04-03 15:45:06.000000000 +0500
+++ dokuwiki/inc/template.php   2009-04-03 16:10:44.000000000 +0500
@@ -372,7 +372,7 @@
   foreach($data as $tag => $inst){
     foreach($inst as $attr){
       echo '<',$tag,' ',buildAttributes($attr);
-      if(isset($attr['_data'])){
+      if(isset($attr['_data']) || $tag == 'script'){
           if($tag == 'script' && $attr['_data'])
             $attr['_data'] = "<!--//--><![CDATA[//><!--\n".
                              $attr['_data'].

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