Move the dwim ref logic into get_fork_point() and return an error code
so that callers of get_fork_point() know if something went wrong.

Alex Torok (1):
  rebase: fix --fork-point with short refname

 builtin/merge-base.c         | 14 +++-----------
 builtin/rebase.c             |  5 +++--
 commit.c                     | 19 +++++++++++++------
 commit.h                     |  2 +-
 refs.c                       | 14 ++++++++++++++
 refs.h                       |  2 ++
 t/t3431-rebase-fork-point.sh | 20 ++++++++++++++++++++
 7 files changed, 56 insertions(+), 20 deletions(-)

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2.17.1