Resolved issue 0000697: with generic user a author name is necessary to comment picture.

+ Change way to determinate if user is a guest (use functions like is_admin)


git-svn-id: http://piwigo.org/svn/trunk@2029 68402e56-0260-453c-a942-63ccdbb3a9ee

feed.php

@@ -91,7 +91,7 @@ SELECT user_id,
 else
 {
   $image_only = true;
-  if (!$user['is_the_guest'])
+  if (!is_a_guest())
   {// auto session was created - so switch to guest
     $user = build_user( $conf['guest_id'], true );
   }