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

admin/include/themes.class.php

@@ -114,12 +114,13 @@ class themes
 
         if (empty($errors))
         {
-          $query = "
-INSERT INTO ".THEMES_TABLE."
-  SET id = '".$theme_id."'
-    , version = '".$this->fs_themes[$theme_id]['version']."'
-    , name = '".$this->fs_themes[$theme_id]['name']."'
-;";
+          $query = '
+INSERT INTO '.THEMES_TABLE.'
+  (id, version, name)
+  VALUES(\''.$theme_id.'\',
+         \''.$this->fs_themes[$theme_id]['version'].'\',
+         \''.$this->fs_themes[$theme_id]['name'].'\')
+;';
           pwg_query($query);
         }
         break;