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 v4.19.265 by commit f08ee2aa24c076f81d84e26e213d8c6f4efd9f50, it was introduced in version v2.6.39 by commit 61b1ab4583e275af216c8454b9256de680499b19. For more details please see the references link.