[gnome-software] trivial: Allow calling gs_feature_tile_new() with no app set

[Richard Hughes <rhughes src gnome org>]

commit 9f1ae76871c4db334b17f8f4290ea9f505e75021
Author: Richard Hughes <richard hughsie com>
Date:   Thu May 4 16:02:30 2017 +0100

    trivial: Allow calling gs_feature_tile_new() with no app set

 src/gs-feature-tile.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/gs-feature-tile.c b/src/gs-feature-tile.c
index 1f8e4fa..f5fcadd 100644
--- a/src/gs-feature-tile.c
+++ b/src/gs-feature-tile.c
@@ -158,7 +158,8 @@ gs_feature_tile_new (GsApp *app)
        GsFeatureTile *tile;
 
        tile = g_object_new (GS_TYPE_FEATURE_TILE, NULL);
-       gs_app_tile_set_app (GS_APP_TILE (tile), app);
+       if (app != NULL)
+               gs_app_tile_set_app (GS_APP_TILE (tile), app);
 
        return GTK_WIDGET (tile);
 }