Add description_callback and description_arguments fields to {menu_router}.
function system_update_8013() {
if (!db_field_exists('menu_router', 'description_callback')) {
$spec = array(
'description' => 'A function which will alter the description. Defaults to t().',
'type' => 'varchar',
'length' => 255,
'not null' => TRUE,
'default' => '',
);
db_add_field('menu_router', 'description_callback', $spec);
}
if (!db_field_exists('menu_router', 'description_arguments')) {
$spec = array(
'description' => 'A serialized array of arguments for the description callback. If empty, the description will be used as the sole argument for the description callback.',
'type' => 'varchar',
'length' => 255,
'not null' => TRUE,
'default' => '',
);
db_add_field('menu_router', 'description_arguments', $spec);
}
}