fdo#80333: .doc has large black rectangles between paragraphs

These black rectangles are character shadows, because checking
whether there is a border at all was missing. In Word there
is no shadow without a border.

(cherry picked from commit c2e708d61746a259888c0e5fb1d3e9a43e3ca696)
Signed-off-by: Andras Timar <andras.timar@collabora.com>

Conflicts:
	sw/qa/extras/ww8import/ww8import.cxx

Change-Id: Ib3cb4e904fdd33f215c81d7c02762a196f484b1b