[gnome-software/gnome-3-36] trivial: Fix unlikely but possible segfault in the self tests

[Richard Hughes <rhughes src gnome org>]

commit 6ec847f670e216d9b8cc6e45622de3b43a4897bf
Author: Richard Hughes <richard hughsie com>
Date:   Fri Feb 7 13:57:01 2020 +0000

    trivial: Fix unlikely but possible segfault in the self tests
    
    Spotted by Coverity.

 plugins/fedora-langpacks/gs-self-test.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/plugins/fedora-langpacks/gs-self-test.c b/plugins/fedora-langpacks/gs-self-test.c
index 895b4947..44de89c0 100644
--- a/plugins/fedora-langpacks/gs-self-test.c
+++ b/plugins/fedora-langpacks/gs-self-test.c
@@ -35,6 +35,8 @@ gs_plugins_fedora_langpacks_func (GsPluginLoader *plugin_loader)
                                         "refine-flags", GS_PLUGIN_REFINE_FLAGS_REQUIRE_ICON,
                                         NULL);
        list = gs_plugin_loader_job_process (plugin_loader, plugin_job, NULL, &error);
+       g_assert_nonnull (list);
+       g_assert_no_error (error);
 
        /* check if we have just one app in the list */
        g_assert_cmpint (gs_app_list_length (list), ==, 1);