[gnome-software] trivial: Add a sanity check when deduplicating GsApps

[Richard Hughes <rhughes src gnome org>]

commit 81e2a72fd868b21830f9733d9cec799f3e3ce24a
Author: Richard Hughes <richard hughsie com>
Date:   Fri Aug 8 23:05:27 2014 +0200

    trivial: Add a sanity check when deduplicating GsApps

 src/gs-app.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/gs-app.c b/src/gs-app.c
index 2f21865..8db004f 100644
--- a/src/gs-app.c
+++ b/src/gs-app.c
@@ -1758,6 +1758,7 @@ gs_app_subsume (GsApp *app, GsApp *other)
 
        g_return_if_fail (GS_IS_APP (app));
        g_return_if_fail (GS_IS_APP (other));
+       g_return_if_fail (app != other);
 
        /* an [updatable] installable package is more information than
         * just the fact that something is installed */