Fixing timezone_value if is empty

main/admin/settings.php

@@ -475,8 +475,13 @@ if (!empty($_GET['category']) && !in_array($_GET['category'], array('Plugins', '
             $allowed_picture_types = array ('jpg', 'jpeg', 'png', 'gif');
             $form->addRule('pdf_export_watermark_path', get_lang('OnlyImagesAllowed').' ('.implode(',', $allowed_picture_types).')', 'filetype', $allowed_picture_types);    
         }
+        
         if ($row['variable'] == 'timezone_value') {
-            $form->addElement('html', sprintf(get_lang('LocalTimeUsingPortalTimezoneXIsY'),$row['selected_value'],api_get_local_time()));
+            $timezone = $row['selected_value'];
+            if (empty($timezone)) {
+                $timezone = _api_get_timezone();
+            }
+            $form->addElement('html', sprintf(get_lang('LocalTimeUsingPortalTimezoneXIsY'), $timezone, api_get_local_time()));
         }       	
     }