ofz#5468 Integer-overflow

Change-Id: Ie2792b7dffaffe939778a1546653424ac03ea30e
Reviewed-on: https://gerrit.libreoffice.org/48105Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

lotuswordpro/source/filter/lwpparastyle.cxx

@@ -440,8 +440,8 @@ void LwpParaStyle::ApplyIndent(LwpPara* pPara, XFParaStyle* pParaStyle, LwpInden
         {
             if (pPara->GetBulletFlag())
             {
-                pTotalIndent->SetMAll(pParentIndent->GetMAll() + pTotalIndent->GetMAll());
-                pTotalIndent->SetMRight(pParentIndent->GetMRight()+ pTotalIndent->GetMRight());
+                pTotalIndent->SetMAll(o3tl::saturating_add(pParentIndent->GetMAll(), pTotalIndent->GetMAll()));
+                pTotalIndent->SetMRight(o3tl::saturating_add(pParentIndent->GetMRight(), pTotalIndent->GetMRight()));
                 pParaStyle->SetMargins(LwpTools::ConvertToMetric(LwpTools::ConvertFromUnits(
                     pTotalIndent->GetMAll())), pTotalIndent->GetRight());
                 pPara->SetIndent(pTotalIndent.release());