dbus: Don't spew to console when unable to connect to dbus daemon
dbus: Don't spew to console when unable to connect to dbus daemon

Instead pass the error up for the caller to decide what to do.

This prevent untrappable warning messages from showing up at the
console if gconftool --makefile-install-rule is called.

GNOME/gconf,GNOME/gconf,GNOME/gconf,GNOME/gconf