OAIHarvest: harvesting "from beginning" fix
- FIX Fixes an exception that would happen upon the initial harvest of a new OAI harvest source marked to be harvested "from beginning". (closes #2793)
Reported-by: Jean-Yves Le Meur <Jean-Yves.Le.Meur@cern.ch>
Reviewed-by: Samuele Kaplun <samuele.kaplun@cern.ch>
Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>