[PATCH 0/4] Teach diff_tree_sha1() to accept NULL sha1 for empty trees

Some preparatory patches for my reworked nparent tree-walker. Please apply.

Thanks beforehand, Kirill

Kirill Smelkov (4):
  tree-diff: allow diff_tree_sha1 to accept NULL sha1
  tree-diff: convert diff_root_tree_sha1() to just call diff_tree_sha1
    with old=NULL
  line-log: convert to using diff_tree_sha1()
  revision: convert to using diff_tree_sha1()

 line-log.c  | 26 ++------------------------
 revision.c  | 12 +-----------
 tree-diff.c | 27 +++++----------------------
 3 files changed, 8 insertions(+), 57 deletions(-)