journaler: fix flush bug
journaler: fix flush bug

Fixes problem with aec1203d8502ad9b8583b53e55491f3a43309b97

Also uses decode for entry sizes (endian-safe!).

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph