this reverts

commit 93eefe54
Author: Krisztian Pinter <pin.terminator@gmail.com>
Date:   Fri Sep 6 14:45:13 2013 +0200

    Make SvtHistoryOptions not return files if they can't be opened

which seemed like a good idea, but was only really to fix a cosmetic
problem, while the outcome was a more serious issue

Change-Id: Ic9c9c136e1e50f5e28fe377b64f56e501fb836ca