- refactoring page['category'] before 1.7 release

page['category'] is not an id anymore, but an associative array of category info
all of page['cat_xxx'] or page['uppercats'] merged into one
simplifies calls to make_index_url
give plugins a clean start for page variables for version 1.7

git-svn-id: http://piwigo.org/svn/trunk@1861 68402e56-0260-453c-a942-63ccdbb3a9ee

include/category_default.inc.php

@@ -157,7 +157,7 @@ foreach ($pictures as $row)
 
   if ($user['show_nb_comments']
       and isset($page['category'])
-      and $page['cat_commentable'])
+      and $page['category']['commentable'])
   {
     $query = '
 SELECT COUNT(*) AS nb_comments