[patch] Fix critical warning when there is no system bus

[Link Dupont]

I am not a committer to polkit, but this looks like a reasonable patch 
to me. +1 FWIW

On Thu, Oct 19, 2017 at 6:11 AM, Richard Hughes <hughsient at gmail.com> 
wrote:
> The patch attached fixes a CI failure as seen by gnome-software using
> the new Gitlab instance. Tested on F27.
> 
> Richard.
> _______________________________________________
> polkit-devel mailing list
> polkit-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/polkit-devel