bisect-kit: fix exception for command 'view --more'

BUG=chromium:776314
TEST=run bisector with 'view --more'

Change-Id: I4c1a3dd3e7e7af1a13573bf55efdbf5fae1e0853
Reviewed-on: https://chromium-review.googlesource.com/768582
Commit-Ready: Kuang-che Wu <kcwu@chromium.org>
Tested-by: Kuang-che Wu <kcwu@chromium.org>
Reviewed-by: Owen Lin <owenlin@chromium.org>
1 file changed