Add paranoia check.
Add paranoia check.

If the callback is instant we need to add a guard to the list.

git-svn-id: ea5ea25908b0b363893e799f51beeda82c91f594@37507 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33

jordemort/edbus,jordemort/edbus