The problem is that the pMaster->GetFormatted() screws up the offset of
the follow frame; there isn't any hope of fixing this up when it happens
so deep inside Format_()... so instead try a conservative check on the
outside (can't check the position there as Format_ moves around quite a
bit) and format the master there already, and then SetOfst() to fix
things.

Change-Id: I0a119ccf1561ece031cec03db3c36155f271a6a8
Reviewed-on: https://gerrit.libreoffice.org/58726
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>