Fix a vicious bug hidden by another bug when a banned user

Fix a vicious bug hidden by another bug when a banned user
try to authenticate by cookie.

 classes/platal.php           |    4 ++--
 classes/plmailer.php         |    3 +--
 include/xorg.inc.php         |    3 ++-
 include/xorg.misc.inc.php    |    2 +-
 include/xorg/session.inc.php |   10 ++++++++++
 5 files changed, 16 insertions(+), 6 deletions(-)

git-svn-id: svn+ssh://murphy/home/svn/platal/trunk@1929 839d8a87-29fc-0310-9880-83ba4fa771e5