If a user bookmarks or reloads the logout page, we don't want to show an error.

webtools/PLIF/PLIF/Service/Components/Login.pm

@@ -121,11 +121,14 @@ sub cmdLoginLogout {
     my $self = shift;
     my($app) = @_;
     my $user = $app->getObject('user');
-    $self->assert(defined($user), 0, 'Not logged in, cannot log out');
+    if (defined($user)) {
         $self->assert($app->getSelectingServiceList('user.logout.'.$app->input->defaultOutputProtocol)->logoutUser($app, $user) or
                       $app->getSelectingServiceList('user.logout.generic')->logoutUser($app, $user),
                       0, 'Logging out when using the '.($app->input->defaultOutputProtocol).' protocol is not supported');
         $app->removeObject($user);
+    } else {
+        $self->warn(4, 'tried to log out but was not logged in');
+    }
     $app->noCommand();
 }