Crash test update

[Caolán McNamara]

On Wed, 2018-08-01 at 18:58 +0000, Crashtest VM wrote:
> New crashtest update available at http://dev-builds.libreoffice.org/c
> rashtest/53aeb204feb665c4f2bd2220df5c12f09dc530a4/

ooo81857-1.ods (at least) seems to have started crashing at...

commit 3c15daa2a11d675a37b2d75a3f9952cfd60b3e98
Date:   Tue Jul 17 11:38:40 2018 +0200

    even more implicit intersection computation