Crash test update

[Caolán McNamara]

On Wed, 2020-12-02 at 20:46 +0000, crashtest wrote:
> New crashtest update available at  
> https://dev-builds.libreoffice.org/crashtest/f7e2f5bca938aa916830e07895d2da6820282055/

FWIW the reoccurring SwLayoutCache::CompareLayout assert at
sw/source/core/layout/laycache.cxx:352

https://dev-
builds.libreoffice.org/crashtest/f7e2f5bca938aa916830e07895d2da68202820
55/backtraces/task141-core.backtrace.txt

can be reproduced with e.g. fdo33533-1.odt and bisects to

commit c0864f26f3143ea81c65d3826fae32a8fd54c531
Date:   Fri Nov 6 21:47:21 2020 +0100

    sw_fieldmarkhide: init fieldmark mode from options

but I haven't a notion what "!pFrame->GetMergedPara()" might mean