Fix some issues with database engines :

- insert into syntax not correct for posgresql or sqlite
- add languages table
- incorrect function for row count (sqlite)

git-svn-id: http://piwigo.org/svn/trunk@5452 68402e56-0260-453c-a942-63ccdbb3a9ee

include/dblayer/functions_pdo-sqlite.inc.php

@@ -174,7 +174,7 @@ function pwg_db_changes(PDOStatement $result=null)
 
 function pwg_db_num_rows(PDOStatement $result) 
 { 
-  return $result->columnCount();
+  return $result->rowCount();
 }
 
 function pwg_db_fetch_assoc($result)