[O] org-caldav can't find org-prepare-agenda-buffers

[Julien Cubizolles]

As of today, org-cadav-syn fails with

--8<---------------cut here---------------start------------->8---
org-export-icalendar: Symbol's function definition is void: 
org-prepare-agenda-buffers
--8<---------------cut here---------------end--------------->8---

Actually, I can't find this function but org-agenda-prepare-buffers
exist. Are there two different functions or is there a confusion
somewhere ?