[gnome-software/wip/rancell/reviews] Use g_autofree for a string

[Robert Ancell <rancell src gnome org>]

commit e594365f355fcf88292082aca1e500f0b0e5d57a
Author: Robert Ancell <robert ancell canonical com>
Date:   Wed Mar 2 14:51:51 2016 +1300

    Use g_autofree for a string

 src/plugins/gs-plugin-ubuntu-reviews.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/src/plugins/gs-plugin-ubuntu-reviews.c b/src/plugins/gs-plugin-ubuntu-reviews.c
index e7a18f9..6c36a1d 100644
--- a/src/plugins/gs-plugin-ubuntu-reviews.c
+++ b/src/plugins/gs-plugin-ubuntu-reviews.c
@@ -553,7 +553,7 @@ parse_review (JsonNode *node)
        GsReview *review;
        JsonObject *object;
        gint64 star_rating;
-       gchar *id_string;
+       g_autofree gchar *id_string = NULL;
 
        if (!JSON_NODE_HOLDS_OBJECT (node))
                return NULL;
@@ -571,7 +571,6 @@ parse_review (JsonNode *node)
        gs_review_set_date (review, parse_date_time (json_object_get_string_member (object, "date_created")));
        id_string = g_strdup_printf ("%ld", json_object_get_int_member (object, "id"));
        gs_review_add_metadata (review, "ubuntu-id", id_string);
-       g_free (id_string);
 
        return review;
 }