[gnome-software] appstream: Fix a leak when adding alternates

[Kalev Lember <klember src gnome org>]

commit 0b366c27720c3a89f7507d0ce69b74b8c1a9799b
Author: Kalev Lember <klember redhat com>
Date:   Fri Oct 12 15:46:46 2018 +0200

    appstream: Fix a leak when adding alternates

 plugins/core/gs-appstream.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/plugins/core/gs-appstream.c b/plugins/core/gs-appstream.c
index 4df4d6e7..3efc679e 100644
--- a/plugins/core/gs-appstream.c
+++ b/plugins/core/gs-appstream.c
@@ -1037,7 +1037,7 @@ gs_appstream_add_alternates (GsPlugin *plugin,
                             GError **error)
 {
        GPtrArray *apps = as_store_get_apps (store);
-       GPtrArray *ids = g_ptr_array_new_with_free_func (g_free);
+       g_autoptr(GPtrArray) ids = g_ptr_array_new_with_free_func (g_free);
 
        /* find apps that provide the new name */
        for (guint i = 0; i < apps->len; i++) {