coverity#704849 Unchecked dynamic_cast

Change-Id: If22324ea65a45ac93f6c4b9cbaf9cfb11ef91195
coverity#704854 Unchecked dynamic_cast

Change-Id: I6d7f6e035bb0dcc86f8aebfdfa4b7f9521bc8820
sw: fix indentation in rtfexportfilter

Change-Id: I3055df538fc4dfa625aa942ad0d0e6b6299c53b3