osd: update missing_loc earlier in push
osd: update missing_loc earlier in push

This just avoids l=-1 from showing up in the logs, makes the logic a bit
cleaner (keeps missing and missing_loc in sync).

Signed-off-by: Sage Weil <6dd34506bbd5e58221bbb3e4732d97c91f02277b@newdream.net>

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