[PATCH] fmt-merge-msg: avoid leaking strbuf in shortlog()

["René Scharfe" <l.s.r@web.de>]

Use string_list_append_nodup() instead of string_list_append() to hand
over ownership of a detached strbuf and thus avoid leaking its memory.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
---
 builtin/fmt-merge-msg.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/builtin/fmt-merge-msg.c b/builtin/fmt-merge-msg.c
index 22034f87e7..8e8a15ea4a 100644
--- a/builtin/fmt-merge-msg.c
+++ b/builtin/fmt-merge-msg.c
@@ -377,7 +377,8 @@ static void shortlog(const char *name,
 			string_list_append(&subjects,
 					   oid_to_hex(&commit->object.oid));
 		else
-			string_list_append(&subjects, strbuf_detach(&sb, NULL));
+			string_list_append_nodup(&subjects,
+						 strbuf_detach(&sb, NULL));
 	}
 
 	if (opts->credit_people)
-- 
2.15.1