[gnome-software] trivial: Do not allow id-less GsApp's as related or history items

[Richard Hughes <rhughes src gnome org>]

commit 3e959a3583aacc2cce2f11c7f2dd136ef9fe9074
Author: Richard Hughes <richard hughsie com>
Date:   Tue Sep 12 16:50:58 2017 +0100

    trivial: Do not allow id-less GsApp's as related or history items

 lib/gs-app.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/lib/gs-app.c b/lib/gs-app.c
index 5ae25fa..3fbdac0 100644
--- a/lib/gs-app.c
+++ b/lib/gs-app.c
@@ -3098,6 +3098,8 @@ gs_app_add_related (GsApp *app, GsApp *app2)
        g_autoptr(GMutexLocker) locker = g_mutex_locker_new (&priv->mutex);
 
        g_return_if_fail (GS_IS_APP (app));
+       g_return_if_fail (GS_IS_APP (app2));
+       g_return_if_fail (gs_app_get_id (app2) != NULL);
 
        /* if the app is updatable-live and any related app is not then
         * degrade to the offline state */
@@ -3152,6 +3154,8 @@ gs_app_add_history (GsApp *app, GsApp *app2)
        GsAppPrivate *priv = gs_app_get_instance_private (app);
        g_autoptr(GMutexLocker) locker = g_mutex_locker_new (&priv->mutex);
        g_return_if_fail (GS_IS_APP (app));
+       g_return_if_fail (GS_IS_APP (app2));
+       g_return_if_fail (gs_app_get_id (app2) != NULL);
        g_ptr_array_add (priv->history, g_object_ref (app2));
 }