- fix: quick search error if the query term contained " or '

- optimized sql query in sync_users (called every time on admin page) - a lot faster when #user_cache_categories is big
- added function Template->delete_block_vars (opposite of assign_block_vars)

git-svn-id: http://piwigo.org/svn/branches/branch-1_7@2094 68402e56-0260-453c-a942-63ccdbb3a9ee

include/category_cats.inc.php

@@ -223,13 +223,13 @@ if (count($categories) > 0)
                                     '<br />'
                                   ),
           'DESCRIPTION' =>
-            trigger_event('render_category_literal_description', 
-              trigger_event('render_category_description', 
+            trigger_event('render_category_literal_description',
+              trigger_event('render_category_description',
                 @$category['comment'])),
           'NAME'  => $name,
           )
         );
-        
+
       //plugins need to add/modify sth in this loop ?
       trigger_action('loc_index_category_thumbnail',
         $category, 'categories.category' );
@@ -314,8 +314,8 @@ if (count($categories) > 0)
     }
 
     $template->assign_var_from_handle('CATEGORIES', 'thumbnails');
-    unset( $template->_tpldata['thumbnails.'] );//maybe write a func for that
+    $template->delete_block_vars('thumbnails', true); // category_default reuse them
   }
   trigger_action('loc_end_index_category_thumbnails', $categories);
 }
-?>
+?>