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, 3 insertions, 0 deletions

diff --git a/pack-bitmap.h b/pack-bitmap.h
index 4555907dee..8a04741e12 100644
--- a/pack-bitmap.h
+++ b/pack-bitmap.h
@@ -5,6 +5,9 @@
 #include "khash.h"
 #include "pack-objects.h"
 
+struct commit;
+struct rev_info;
+
 struct bitmap_disk_header {
 	char magic[4];
 	uint16_t version;