[glibmm/glibmm-2-52] Gio::TlsDatabase: Fix memory leak in a vfunc

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 9596b20a82b631323bc06e85bbf6d94509336fa4
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Tue Jun 27 17:09:53 2017 +0200

    Gio::TlsDatabase: Fix memory leak in a vfunc
    
    create_certificate_handle_vfunc() shall delete the returned character array
    after it has been copied to a Glib::ustring, or else it leaks memory.
    Bug 783360

 gio/src/tlsdatabase.hg |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gio/src/tlsdatabase.hg b/gio/src/tlsdatabase.hg
index 85fdba1..1cabc18 100644
--- a/gio/src/tlsdatabase.hg
+++ b/gio/src/tlsdatabase.hg
@@ -99,7 +99,9 @@ public:
 
   _WRAP_VFUNC(TlsCertificateFlags verify_chain_finish(const Glib::RefPtr<AsyncResult>& result), 
"verify_chain_finish", errthrow)
 
+dnl// create_certificate_handle_vfunc() shall return a newly allocated string.
 #m4 _CONVERSION(`GTlsCertificate*',`const Glib::RefPtr<const TlsCertificate>&',`Glib::wrap($3, true)')
+#m4 _CONVERSION(`gchar*',`Glib::ustring',`Glib::convert_return_gchar_ptr_to_ustring($3)')
   _WRAP_VFUNC(Glib::ustring create_certificate_handle(const Glib::RefPtr<const TlsCertificate>& certificate) 
const, "create_certificate_handle")
 
 #m4 
_CONVERSION(`Glib::RefPtr<TlsCertificate>',`GTlsCertificate*',`G_TLS_CERTIFICATE(g_object_ref(Glib::unwrap($3)))')