[gnome-software] Never show 'Unknown' in the package history listbox

[Richard Hughes <rhughes src gnome org>]

commit ea74b2121012d41c34390dd58393605dc86ff680
Author: Richard Hughes <richard hughsie com>
Date:   Tue Sep 24 12:26:44 2013 +0100

    Never show 'Unknown' in the package history listbox

 src/plugins/gs-plugin-packagekit-history.c |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)
---
diff --git a/src/plugins/gs-plugin-packagekit-history.c b/src/plugins/gs-plugin-packagekit-history.c
index 164b629..6060d64 100644
--- a/src/plugins/gs-plugin-packagekit-history.c
+++ b/src/plugins/gs-plugin-packagekit-history.c
@@ -113,9 +113,17 @@ gs_plugin_packagekit_refine_add_history (GsApp *app, GVariant *dict)
                gs_app_set_state (history, GS_APP_STATE_UPDATABLE);
                break;
        default:
+               ret = FALSE;
                break;
        }
 
+       /* we have nothing useful to show for this item */
+       if (!ret) {
+               g_debug ("ignoring history kind: %s",
+                        pk_info_enum_to_string (info_enum));
+               goto out;
+       }
+
        /* set the history time and date */
        ret = g_variant_lookup (dict, "timestamp", "t", &timestamp);
        g_assert (ret);
@@ -128,10 +136,11 @@ gs_plugin_packagekit_refine_add_history (GsApp *app, GVariant *dict)
 
        /* add the package to the main application */
        gs_app_add_history (app, history);
-       g_object_unref (history);
 
        /* use the last event as approximation of the package timestamp */
        gs_app_set_install_date (app, timestamp);
+out:
+       g_object_unref (history);
 }
 
 static gboolean