[gnome-software] Fix purchasing not working after authentication

[Robert Ancell <rancell src gnome org>]

commit fe27922ba35a302e76f775626d9b38e00c900823
Author: Robert Ancell <robert ancell canonical com>
Date:   Thu Mar 8 10:33:47 2018 +0100

    Fix purchasing not working after authentication

 src/gs-page.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/gs-page.c b/src/gs-page.c
index 217db16a..a9882e86 100644
--- a/src/gs-page.c
+++ b/src/gs-page.c
@@ -327,6 +327,7 @@ gs_page_purchase_authenticate_cb (GsPage *page,
 
        plugin_job = gs_plugin_job_newv (GS_PLUGIN_ACTION_PURCHASE,
                                         "app", helper->app,
+                                        "price", gs_app_get_price (helper->app),
                                         "failure-flags", GS_PLUGIN_FAILURE_FLAGS_USE_EVENTS,
                                         NULL);
        gs_plugin_loader_job_process_async (priv->plugin_loader, plugin_job,