[PATCH 04/10] unpack-trees API: don't have clear_unpack_trees_porcelain() reset

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

Change the clear_unpack_trees_porcelain() to be like a *_release()
function, not a *_reset() (in strbuf.c terms). Let's move the only API
user that relied on the latter to doing its own
unpack_trees_options_init(). See the commit that introduced
unpack_trees_options_init() for details on the control flow involved
here.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 merge-recursive.c | 1 +
 unpack-trees.c    | 1 -
 2 files changed, 1 insertion(+), 1 deletion(-)

diff --git a/merge-recursive.c b/merge-recursive.c
index d24a4903f1d..a77f66b006c 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -442,6 +442,7 @@ static void unpack_trees_finish(struct merge_options *opt)
 {
 	discard_index(&opt->priv->orig_index);
 	clear_unpack_trees_porcelain(&opt->priv->unpack_opts);
+	unpack_trees_options_init(&opt->priv->unpack_opts);
 }
 
 static int save_files_dirs(const struct object_id *oid,
diff --git a/unpack-trees.c b/unpack-trees.c
index 94767d3f96f..e7365322e82 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -197,7 +197,6 @@ void clear_unpack_trees_porcelain(struct unpack_trees_options *opts)
 {
 	strvec_clear(&opts->msgs_to_free);
 	dir_clear(&opts->dir);
-	memset(opts->msgs, 0, sizeof(opts->msgs));
 }
 
 static int do_add_entry(struct unpack_trees_options *o, struct cache_entry *ce,
-- 
2.33.0.1404.g83021034c5d