[gnome-software] trivial: flatpak: Don't return NULL from a gboolean return value function

[Kalev Lember <klember src gnome org>]

commit eb68607baea3b83b719acb739516b361a6758bcf
Author: Kalev Lember <klember redhat com>
Date:   Thu Mar 8 16:39:52 2018 +0100

    trivial: flatpak: Don't return NULL from a gboolean return value function

 plugins/flatpak/gs-flatpak.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/plugins/flatpak/gs-flatpak.c b/plugins/flatpak/gs-flatpak.c
index 17920b3a..a27f8bbd 100644
--- a/plugins/flatpak/gs-flatpak.c
+++ b/plugins/flatpak/gs-flatpak.c
@@ -2656,7 +2656,7 @@ gs_flatpak_get_list_for_install_or_update (GsFlatpak *self,
 
                gs_app_set_origin (app_tmp, gs_app_get_origin (app));
                if (!gs_plugin_refine_item_state (self, app_tmp, cancellable, error))
-                       return NULL;
+                       return FALSE;
                if (is_update && !gs_app_is_updatable (app_tmp)) {
                        g_debug ("not adding related %s as it's not updatable", ref_display);
                        continue;