[gnome-software] trivial: Ensure cancelled tasks return an error to prevent a warning

[Richard Hughes <rhughes src gnome org>]

commit 16f60d76a3eb36ccd6b320a25af43f8b4d6f91e5
Author: Richard Hughes <richard hughsie com>
Date:   Wed Aug 30 12:44:43 2017 +0100

    trivial: Ensure cancelled tasks return an error to prevent a warning

 plugins/packagekit/gs-plugin-packagekit-refine.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/plugins/packagekit/gs-plugin-packagekit-refine.c 
b/plugins/packagekit/gs-plugin-packagekit-refine.c
index 1de1d1e..c67d53c 100644
--- a/plugins/packagekit/gs-plugin-packagekit-refine.c
+++ b/plugins/packagekit/gs-plugin-packagekit-refine.c
@@ -285,8 +285,8 @@ gs_plugin_packagekit_resolve_packages (GsPlugin *plugin,
 
        /* if the user types more characters we'll get cancelled - don't go on
         * to mark apps as unavailable because packages->len = 0 */
-       if (g_cancellable_is_cancelled (cancellable)) {
-               g_prefix_error (error, "not refining - cancelled: ");
+       if (g_cancellable_set_error_if_cancelled (cancellable, error)) {
+               gs_utils_error_convert_gio (error);
                return FALSE;
        }