Yes, the other callers check the return value of ctdb_lockdb_mark().
However, this is called in a void function and ctdb_lockdb_mark() has
already printed any error message. All we can do is explicitly ignore
the return value.
Signed-off-by: Martin Schwenke <martin@meltin.net> Reviewed-by: Amitay Isaacs <amitay@gmail.com>