search: response recids fix
search: response recids fix

* Fixes an exception when calling `Results.recids`. (closes #3335)

Signed-off-by: Jan Aage Lavik <8d55e006a1b29770f275a5c59a7341f17f8e69d5@cern.ch>

inveniosoftware/invenio,inveniosoftware/invenio,tiborsimko/invenio,tiborsimko/invenio