Merge branch 'bw/object-id'

Conversion from uchar[20] to struct object_id continues. * bw/object-id: receive-pack: don't access hash of NULL object_id pointer notes: don't access hash of NULL object_id pointer tree-diff: don't access hash of NULL object_id pointer

Junio C Hamano committed Aug 11, 2017 at 13:26 UTC c7528f4d8a2b8e4bf843b3eb95d2b7899a38c1fa

No changes.