[gnome-software] trivial: Add some debugging when getting key colors

[Richard Hughes <rhughes src gnome org>]

commit c7a4451d7ecf98edae59fb2b0fce0af827167c40
Author: Richard Hughes <richard hughsie com>
Date:   Wed Aug 3 15:07:00 2016 +0100

    trivial: Add some debugging when getting key colors

 src/plugins/gs-plugin-key-colors.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/src/plugins/gs-plugin-key-colors.c b/src/plugins/gs-plugin-key-colors.c
index b3b32d1..65f31ea 100644
--- a/src/plugins/gs-plugin-key-colors.c
+++ b/src/plugins/gs-plugin-key-colors.c
@@ -175,8 +175,10 @@ gs_plugin_refine_app (GsPlugin *plugin,
 
        /* no pixbuf */
        pb = gs_app_get_pixbuf (app);
-       if (pb == NULL)
+       if (pb == NULL) {
+               g_debug ("no pixbuf, so no key colors");
                return TRUE;
+       }
 
        /* get a list of key colors */
        pb_small = gdk_pixbuf_scale_simple (pb, 32, 32, GDK_INTERP_BILINEAR);