[PATCHv2 0/6] Add missing includes and forward declares

This series fixes compilation errors when using a simple test.c file that includes git-compat-util.h and then exactly one other header (and repeating this for different headers of git).

Changes since v1:
  - Followed Peff's suggestion to make my simple test .c file first
    #include git-compat-util.h; removes the need for inclusions of this
    header or stdlib.h or stdio.h throughout my series.  (Patches 6-8 of
    v1 no longer necessary at all.)
  - Removed the explanatory comments about why various #include's were
    needed from v1.

Note: the final patch has minor conflicts with topics in flight in
next and pu; it can just be dropped and I can resubmit it later if
that is easier.

Elijah Newren (6):
  Add missing includes and forward declares
  alloc: make allocate_alloc_state and clear_alloc_state more consistent
  Move definition of enum branch_track from cache.h to branch.h
  urlmatch.h: fix include guard
  compat/precompose_utf8.h: use more common include guard style
  Add missing includes and forward declares

 alloc.c                  |  2 +-
 alloc.h                  |  4 +++-
 apply.h                  |  3 +++
 archive.h                |  3 +++
 attr.h                   |  1 +
 bisect.h                 |  2 ++
 branch.h                 | 13 +++++++++++++
 bulk-checkin.h           |  2 ++
 cache.h                  | 10 ----------
 column.h                 |  1 +
 commit-graph.h           |  1 +
 compat/precompose_utf8.h |  3 ++-
 config.c                 |  1 +
 config.h                 |  5 +++++
 connected.h              |  1 +
 convert.h                |  2 ++
 csum-file.h              |  2 ++
 diffcore.h               |  4 ++++
 dir-iterator.h           |  2 ++
 environment.c            |  1 +
 fsck.h                   |  1 +
 fsmonitor.h              |  7 +++++++
 gpg-interface.h          |  2 ++
 khash.h                  |  3 +++
 list-objects-filter.h    |  4 ++++
 list-objects.h           |  4 ++++
 ll-merge.h               |  2 ++
 mailinfo.h               |  2 ++
 mailmap.h                |  2 ++
 merge-recursive.h        |  4 +++-
 notes-merge.h            |  4 ++++
 notes-utils.h            |  3 +++
 notes.h                  |  3 +++
 object-store.h           |  1 +
 object.h                 |  2 ++
 oidmap.h                 |  1 +
 pack-bitmap.h            |  3 +++
 pack-objects.h           |  1 +
 patch-ids.h              |  6 ++++++
 path.h                   |  1 +
 pathspec.h               |  5 +++++
 pretty.h                 |  4 ++++
 reachable.h              |  2 ++
 reflog-walk.h            |  1 +
 refs.h                   |  2 ++
 remote.h                 |  1 +
 repository.h             |  2 ++
 resolve-undo.h           |  2 ++
 revision.h               |  1 +
 send-pack.h              |  4 ++++
 sequencer.h              |  5 +++++
 shortlog.h               |  2 ++
 submodule.h              | 10 ++++++++--
 tempfile.h               |  1 +
 trailer.h                |  2 ++
 tree-walk.h              |  2 ++
 unpack-trees.h           |  5 ++++-
 url.h                    |  2 ++
 urlmatch.h               |  2 ++
 utf8.h                   |  2 ++
 worktree.h               |  1 +
 61 files changed, 160 insertions(+), 17 deletions(-)