[PATCH 2 of 2] fileset: do not crash by unary negate operation

[Augie Fackler]

On Sat, Jan 13, 2018 at 03:53:59PM +0900, Yuya Nishihara wrote:
> # HG changeset patch
> # User Yuya Nishihara <yuya at tcha.org>
> # Date 1515824009 -32400
> #      Sat Jan 13 15:13:29 2018 +0900
> # Node ID ae8b3e1707597343265e2d2cbc99a665942a76df
> # Parent  7a283960200aedf4461273ebc0c90f6f677c4a59
> fileset: do not crash by unary negate operation

queued, thanks