ipvs: fix WARNING in _ipvscleanupbatch()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.4.224 by commit 7effc4ce3d1434ce6ff286866585a6e905fdbfc1, it was introduced in version v2.6.39 by commit 61b1ab4583e275af216c8454b9256de680499b19. For more details please see the references link.