after
    commit 13894996
    Date:   Sat May 4 21:46:31 2019 +0200
    handle empty Rectangle better in starmath
these test results now seem to depend on display scaling somewhat

Change-Id: Ib998f8b033a80d16e00414b0ceded806ddadc917
Reviewed-on: https://gerrit.libreoffice.org/72545
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>