tdf#153613 writerfilter: handle defered break before SDT start

If there are deferred column or page breaks before an SDT,
then before starting the SDT we need to determine if the
existing run needs to split - same as everywhere else.

There was only one existing unit test that had any defered
page or column breaks, so only two example documents to work from.
That was tdf125778_lostPageBreakTOX.docx.

Change-Id: I02d71577af13399d8aaf3ba0ce40fc6bed5e6e3c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/148148
Tested-by: Jenkins
Reviewed-by: Justin Luth <jluth@mail.com>
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/148362
Tested-by: Justin Luth <jluth@mail.com>

0 files changed, 0 insertions, 0 deletions