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

install.php

@@ -380,7 +380,10 @@ INSERT INTO '.$prefixeTable.'config (param,value,comment)
 
     // PWG_CHARSET is required for building the fs_themes array in the
     // themes class
-    define('PWG_CHARSET', $pwg_charset);
+    if (!defined('PWG_CHARSET'))
+    {
+      define('PWG_CHARSET', $pwg_charset);
+    }
     activate_all_themes();
 
     $insert = array(