When an etcd instance attempts to perform service discovery, if a cluster size with negative value is provided, the etcd instance will panic without recovery because of
Signed-off-by: Gyuho Lee <leegyuho@amazon.com>
Found using https://go-critic.github.io/overview#boolExprSimplify-ref
Signed-off-by: Gyuho Lee <gyuhox@gmail.com>