[gnome-control-center] printers: Replace D-Bus unrefs with g_autoptr

[Robert Ancell <rancell src gnome org>]

commit e256dd57c3776e05296bd23a08571d421c729cbe
Author: Robert Ancell <robert ancell canonical com>
Date:   Thu Nov 21 22:06:40 2019 +1300

    printers: Replace D-Bus unrefs with g_autoptr
    
    This case could leak the GDBusConnection

 panels/printers/pp-utils.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/panels/printers/pp-utils.c b/panels/printers/pp-utils.c
index 19857a942..933a71f9e 100644
--- a/panels/printers/pp-utils.c
+++ b/panels/printers/pp-utils.c
@@ -258,7 +258,7 @@ printer_rename (const gchar *old_name,
   cups_dest_t      *dests = NULL;
   cups_dest_t      *dest = NULL;
   cups_job_t       *jobs = NULL;
-  GDBusConnection  *bus;
+  g_autoptr(GDBusConnection) bus = NULL;
   const gchar      *printer_location = NULL;
   const gchar      *printer_info = NULL;
   const gchar      *printer_uri = NULL;
@@ -477,7 +477,6 @@ printer_rename (const gchar *old_name,
                                                 -1,
                                                 NULL,
                                                 &add_error);
-          g_object_unref (bus);
 
           if (output)
             {