[gnome-software/gnome-3-20] trivial: Do not show (null) in xdg-app update descriptions

[Richard Hughes <rhughes src gnome org>]

commit c787490f385aa7c0bbc3832cbb3fa84f3ecda936
Author: Richard Hughes <richard hughsie com>
Date:   Fri Mar 4 15:23:27 2016 +0000

    trivial: Do not show (null) in xdg-app update descriptions

 src/gs-update-dialog.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/src/gs-update-dialog.c b/src/gs-update-dialog.c
index 8dc5621..937c9a0 100644
--- a/src/gs-update-dialog.c
+++ b/src/gs-update-dialog.c
@@ -99,12 +99,16 @@ set_updates_description_ui (GsUpdateDialog *dialog, GsApp *app)
        kind = gs_app_get_kind (app);
        if (kind == AS_APP_KIND_OS_UPDATE) {
                gtk_window_set_title (GTK_WINDOW (dialog), gs_app_get_name (app));
-       } else if (gs_app_get_source_default (app) != NULL) {
+       } else if (gs_app_get_source_default (app) != NULL &&
+                  gs_app_get_update_version (app) != NULL) {
                g_autofree gchar *tmp = NULL;
                tmp = g_strdup_printf ("%s %s",
                                       gs_app_get_source_default (app),
                                       gs_app_get_update_version (app));
                gtk_window_set_title (GTK_WINDOW (dialog), tmp);
+       } else if (gs_app_get_source_default (app) != NULL) {
+               gtk_window_set_title (GTK_WINDOW (dialog),
+                                     gs_app_get_source_default (app));
        } else {
                gtk_window_set_title (GTK_WINDOW (dialog),
                                      gs_app_get_update_version (app));
@@ -130,7 +134,8 @@ set_updates_description_ui (GsUpdateDialog *dialog, GsApp *app)
 
        /* set update header */
        gtk_widget_set_visible (dialog->box_header, kind == AS_APP_KIND_DESKTOP);
-       gtk_label_set_markup (GTK_LABEL (dialog->label_details), update_desc);
+       if (update_desc != NULL)
+               gtk_label_set_markup (GTK_LABEL (dialog->label_details), update_desc);
        gtk_label_set_label (GTK_LABEL (dialog->label_name), gs_app_get_name (app));
        gtk_label_set_label (GTK_LABEL (dialog->label_summary), gs_app_get_summary (app));