[gnome-software] trivial: Fix a recently introduced -Werror=format warning

[Richard Hughes <rhughes src gnome org>]

commit 400b15a700e99b92fac60ee8affaf0257e9977f7
Author: Richard Hughes <richard hughsie com>
Date:   Wed Mar 2 10:26:26 2016 +0000

    trivial: Fix a recently introduced -Werror=format warning

 src/plugins/gs-plugin-shell-extensions.c |    7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)
---
diff --git a/src/plugins/gs-plugin-shell-extensions.c b/src/plugins/gs-plugin-shell-extensions.c
index 82fa702..926da11 100644
--- a/src/plugins/gs-plugin-shell-extensions.c
+++ b/src/plugins/gs-plugin-shell-extensions.c
@@ -402,9 +402,6 @@ gs_plugin_shell_extensions_parse_app (GsPlugin *plugin,
        as_app_set_kind (app, AS_APP_KIND_SHELL_EXTENSION);
        as_app_set_project_license (app, "GPL-2.0+");
 
-       /* not sure what this is for :/ */
-       pk = json_object_get_int_member (json_app, "pk");
-
        tmp = json_object_get_string_member (json_app, "description");
        if (tmp != NULL) {
                g_autofree gchar *desc = NULL;
@@ -456,15 +453,15 @@ gs_plugin_shell_extensions_parse_app (GsPlugin *plugin,
        }
 
        /* add a screenshot, which curiously isn't in the json */
+       pk = json_object_get_int_member (json_app, "pk");
        if (1) {
                g_autoptr(AsScreenshot) ss = NULL;
                g_autoptr(AsImage) im = NULL;
                g_autofree gchar *uri = NULL;
                uri = g_strdup_printf ("%s/static/extension-data/"
                                       "screenshots/"
-                                      "screenshot_%" G_GSIZE_FORMAT ".png",
+                                      "screenshot_%" G_GUINT64_FORMAT ".png",
                                       SHELL_EXTENSIONS_API_URI, pk);
-               /* TODO: check if the URI exists */
                im = as_image_new ();
                as_image_set_kind (im, AS_IMAGE_KIND_SOURCE);
                as_image_set_url (im, uri);