server/storage/mvcc: fix oss-fuzz issue 44449
server/storage/mvcc: fix oss-fuzz issue 44449

mkumatag/etcd,ajityagaty/etcd,etcd-io/etcd,rnaveiras/etcd,mqliang/etcd,mqliang/etcd,mkumatag/etcd,etcd-io/etcd,ajityagaty/etcd,etcd-io/etcd,rnaveiras/etcd,rnaveiras/etcd,ajityagaty/etcd,mkumatag/etcd,mqliang/etcd