Add missing includes and forward declarations

I looped over the toplevel header files, creating a temporary two-line C
program for each consisting of
  #include "git-compat-util.h"
  #include $HEADER
This patch is the result of manually fixing errors in compiling those
tiny programs.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/list-objects.h b/list-objects.h
index aa618d7f45..ad40762926 100644
--- a/list-objects.h
+++ b/list-objects.h
@@ -1,6 +1,10 @@
 #ifndef LIST_OBJECTS_H
 #define LIST_OBJECTS_H
 
+struct commit;
+struct object;
+struct rev_info;
+
 typedef void (*show_commit_fn)(struct commit *, void *);
 typedef void (*show_object_fn)(struct object *, const char *, void *);
 void traverse_commit_list(struct rev_info *, show_commit_fn, show_object_fn, void *);