resolved fdo#42784 BorderLine with only InnerWidth set does not work
diff --git a/editeng/source/items/borderline.cxx b/editeng/source/items/borderline.cxx
index 8d073c6..b617ff4 100644
--- a/editeng/source/items/borderline.cxx
+++ b/editeng/source/items/borderline.cxx
@@ -298,6 +298,22 @@ void SvxBorderLine::GuessLinesWidths( SvxBorderStyle nStyle, sal_uInt16 nOut, sa
    else
    {
        SetStyle( nStyle );
        if (nOut == 0 && nIn > 0)
        {
            // If only inner width is given swap inner and outer widths for
            // single line styles, otherwise GuessWidth() marks this as invalid
            // and returns a 0 width.
            switch (nStyle)
            {
                case SOLID:
                case DOTTED:
                case DASHED:
                    ::std::swap( nOut, nIn);
                    break;
                default:
                    ;   // nothing
            }
        }
        m_nWidth = m_aWidthImpl.GuessWidth( nOut, nIn, nDist );
    }
}