[PATCH v2 6/6] pack-bitmap[-write]: use `object_array_clear()`, don't leak

["Martin Ågren" <martin.agren@gmail.com>]

Instead of setting the fields of rev->pending to 0/NULL, thereby leaking
memory, call `object_array_clear(&rev->pending)`.

In pack-bitmap.c, we make copies of those fields as `pending_nr` and
`pending_e`. We never update the aliases and the original fields never
change, so the aliases are not really needed and just make it harder
than necessary to understand the code. While we're here, remove the
aliases to make the code easier to follow.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
---
 pack-bitmap-write.c |  4 +---
 pack-bitmap.c       | 10 +++-------
 2 files changed, 4 insertions(+), 10 deletions(-)

diff --git a/pack-bitmap-write.c b/pack-bitmap-write.c
index 8e47a96b3..a8df5ce2a 100644
--- a/pack-bitmap-write.c
+++ b/pack-bitmap-write.c
@@ -297,9 +297,7 @@ void bitmap_writer_build(struct packing_data *to_pack)
 
 			traverse_commit_list(&revs, show_commit, show_object, base);
 
-			revs.pending.nr = 0;
-			revs.pending.alloc = 0;
-			revs.pending.objects = NULL;
+			object_array_clear(&revs.pending);
 
 			stored->bitmap = bitmap_to_ewah(base);
 			need_reset = 0;
diff --git a/pack-bitmap.c b/pack-bitmap.c
index 327634cd7..0a49c1595 100644
--- a/pack-bitmap.c
+++ b/pack-bitmap.c
@@ -653,8 +653,6 @@ static int in_bitmapped_pack(struct object_list *roots)
 int prepare_bitmap_walk(struct rev_info *revs)
 {
 	unsigned int i;
-	unsigned int pending_nr = revs->pending.nr;
-	struct object_array_entry *pending_e = revs->pending.objects;
 
 	struct object_list *wants = NULL;
 	struct object_list *haves = NULL;
@@ -669,8 +667,8 @@ int prepare_bitmap_walk(struct rev_info *revs)
 			return -1;
 	}
 
-	for (i = 0; i < pending_nr; ++i) {
-		struct object *object = pending_e[i].item;
+	for (i = 0; i < revs->pending.nr; ++i) {
+		struct object *object = revs->pending.objects[i].item;
 
 		if (object->type == OBJ_NONE)
 			parse_object_or_die(&object->oid, NULL);
@@ -714,9 +712,7 @@ int prepare_bitmap_walk(struct rev_info *revs)
 	if (!bitmap_git.loaded && load_pack_bitmap() < 0)
 		return -1;
 
-	revs->pending.nr = 0;
-	revs->pending.alloc = 0;
-	revs->pending.objects = NULL;
+	object_array_clear(&revs->pending);
 
 	if (haves) {
 		revs->ignore_missing_links = 1;
-- 
2.14.1.727.g9ddaf86