Fix a bug in Hold.
Fix a bug in Hold.

4x2 roler test is now passing.

alexdebrie/pachyderm,phacops/pachyderm,phacops/pachyderm,klucar/pachyderm,sambooo/pachyderm,sambooo/pachyderm,alexdebrie/pachyderm,sambooo/pachyderm,ShengjieLuo/pachyderm,kunthar/pachyderm,kunthar/pachyderm,ShengjieLuo/pachyderm,alexdebrie/pachyderm,klucar/pachyderm,klucar/pachyderm,ShengjieLuo/pachyderm