feature 1630: upgrade to Piwigo 2.1 :-)

bug 1604: only activate core themes not all themes.

git-svn-id: http://piwigo.org/svn/trunk@5982 68402e56-0260-453c-a942-63ccdbb3a9ee

include/functions.inc.php

@@ -694,7 +694,7 @@ SELECT
   $result = pwg_query($query);
   while ($row = pwg_db_fetch_assoc($result))
   {
-    if (file_exists($conf['themes_dir'].'/'.$row['id'].'/'.'themeconf.inc.php'))
+    if (check_theme_installed($row['id']))
     {
       $themes[ $row['id'] ] = $row['name'];
     }
@@ -706,6 +706,13 @@ SELECT
   return $themes;
 }
 
+function check_theme_installed($theme_id)
+{
+  global $conf;
+
+  return file_exists($conf['themes_dir'].'/'.$theme_id.'/'.'themeconf.inc.php');
+}
+
 /* Returns the PATH to the thumbnail to be displayed. If the element does not
  * have a thumbnail, the default mime image path is returned. The PATH can be
  * used in the php script, but not sent to the browser.
@@ -1148,8 +1155,12 @@ function get_filter_page_value($value_name)
  */
 function get_pwg_charset()
 {
-  defined('PWG_CHARSET') or fatal_error('PWG_CHARSET undefined');
-  return PWG_CHARSET;
+  $pwg_charset = 'utf-8';
+  if (defined('PWG_CHARSET'))
+  {
+    $pwg_charset = PWG_CHARSET;
+  }
+  return $pwg_charset;
 }
 
 /**