fdo#80748: Fix for file corruption due to framePr

 -For framePr Unit test is there in ooxmlexport.cxx
    -http://opengrok.libreoffice.org/xref/core/sw/qa/extras/ooxmlexport/ooxmlexport.cxx#3578

Change-Id: Ic1fd4c7a863d8ab57c6495e20bff6863eb941688
Reviewed-on: https://gerrit.libreoffice.org/10045
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>