- multisize thumb longest side can be smaller than the square size

- remove unused css, shorten/optimize php called very often (at least theoretically should be faster)

git-svn-id: http://piwigo.org/svn/trunk@13240 68402e56-0260-453c-a942-63ccdbb3a9ee

include/functions_user.inc.php

@@ -806,29 +806,6 @@ SELECT
   }
 }
 
-/**
- * search an available feed_id
- *
- * @return string feed identifier
- */
-function find_available_feed_id()
-{
-  while (true)
-  {
-    $key = generate_key(50);
-    $query = '
-SELECT COUNT(*)
-  FROM '.USER_FEED_TABLE.'
-  WHERE id = \''.$key.'\'
-;';
-    list($count) = pwg_db_fetch_row(pwg_query($query));
-    if (0 == $count)
-    {
-      return $key;
-    }
-  }
-}
-
 /*
  * Returns a array with default user value
  *