trivial: Never show (null) for the comment in failed.html
trivial: Never show (null) for the comment in failed.html

ikeydoherty/appstream-glib,ximion/appstream-glib,hughsie/appstream-glib,hughsie/appstream-glib,hughsie/appstream-glib,kalev/appstream-glib,mitya57/appstream-glib,mitya57/appstream-glib,ximion/appstream-glib,ximion/appstream-glib,kalev/appstream-glib,superm1/appstream-glib,superm1/appstream-glib,ikeydoherty/appstream-glib