[gmime] Fixed a leak when adding signatures to a GMimeSignatureList

[Jeffrey Stedfast <fejj src gnome org>]

commit 9a7f102aa3d3babe8b0ca478ed6c7c06d70d9def
Author: Jeffrey Stedfast <jestedfa microsoft com>
Date:   Sun Dec 17 20:04:23 2017 -0500

    Fixed a leak when adding signatures to a GMimeSignatureList

 gmime/gmime-gpgme-utils.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gmime/gmime-gpgme-utils.c b/gmime/gmime-gpgme-utils.c
index 8b814b3..280b92a 100644
--- a/gmime/gmime-gpgme-utils.c
+++ b/gmime/gmime-gpgme-utils.c
@@ -321,6 +321,8 @@ g_mime_gpgme_get_signatures (gpgme_ctx_t ctx, gboolean verify)
        while (sig != NULL) {
                signature = g_mime_signature_new ();
                g_mime_signature_list_add (signatures, signature);
+               g_object_unref (signature);
+               
                g_mime_signature_set_status (signature, (GMimeSignatureStatus) sig->summary);
                g_mime_signature_set_expires (signature, sig->exp_timestamp);
                g_mime_signature_set_created (signature, sig->timestamp);