The WriterSpecificAutoFormatBlock class actually writes a length
into the file that covers the offending SwFormatVertOrient item.

Put in a gross hack to read either 32-bit or 64-bit in
SwFormatVertOrient::Store depending on that length.

The length also covers another item, so we'll just hope nobody ever
changes this stuff ever again!

Change-Id: Idf2f05cc00c098571508adb849f60940966c3328
Reviewed-on: https://gerrit.libreoffice.org/44254Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>