do not rerender metadata for pages without abstract forever FS#1701

Ignore-this: 8ee7f4c5e4ef4f3e66f959dc9bb0c235

darcs-hash:20090802132535-7ad00-05f5712d442f126b2113df44f8252c1ec07c3852.gz

inc/parserutils.php

@@ -236,7 +236,7 @@ function p_get_metadata($id, $key=false, $render=false){
   $meta = p_read_metadata($id, $cache);
 
   // metadata has never been rendered before - do it! (but not for non-existent pages)
-  if ($render && !$meta['current']['description']['abstract'] && page_exists($id)){
+  if ($render && !isset($meta['current']['description']['abstract']) && page_exists($id)){
     $meta = p_render_metadata($id, $meta);
     io_saveFile(metaFN($id, '.meta'), serialize($meta));