pack-bitmap: add free function

Add a function to free struct bitmap_index instances, and use it where
needed (except when rebuild_existing_bitmaps() is used, since it creates
references to the bitmaps within the struct bitmap_index passed to it).

Note that the hashes field in struct bitmap_index is not freed because
it points to another field within the same struct. The documentation for
that field has been updated to clarify that.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/pack-bitmap.h b/pack-bitmap.h
index 19f70043a8..4555907dee 100644
--- a/pack-bitmap.h
+++ b/pack-bitmap.h
@@ -48,6 +48,7 @@ int reuse_partial_packfile_from_bitmap(struct bitmap_index *,
 				       uint32_t *entries, off_t *up_to);
 int rebuild_existing_bitmaps(struct bitmap_index *, struct packing_data *mapping,
 			     khash_sha1 *reused_bitmaps, int show_progress);
+void free_bitmap_index(struct bitmap_index *);
 
 void bitmap_writer_show_progress(int show);
 void bitmap_writer_set_checksum(unsigned char *sha1);