regression from

commit e0ad036e
Author: Luboš Luňák <l.lunak@collabora.com>
Date:   Thu Feb 19 16:39:06 2015 +0100

    mailmerge doesn't need to use the singlefile technique for printing

Change-Id: Ib1a7ae3033c03d13ba930cb6b94d85bd8041334c