gpg-interface: provide clear helper for struct signature_check

The struct has been growing members whose malloced memory needs to be
freed. Do this with one helper function so that no malloced memory shall
be left unfreed.

Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/pretty.c b/pretty.c
index e1e2cad..f6a0023 100644
--- a/pretty.c
+++ b/pretty.c
@@ -1532,8 +1532,7 @@ void format_commit_message(const struct commit *commit,
 
 	free(context.commit_encoding);
 	logmsg_free(context.message, commit);
-	free(context.signature_check.gpg_output);
-	free(context.signature_check.signer);
+	signature_check_clear(&context.signature_check);
 }
 
 static void pp_header(struct pretty_print_context *pp,