n#693238 dmapper: fix margin values vs SBkc = 0 at the end of the doc

The problem was that a continous section break at the end of the
document caused the section margins to be ignored. Just ignoring the
continous section break (only in case it's at the end of the document)
makes the problem go away.

The original fix was commit cd1c434c,
but it got reverted in commit 2dee7d62,
as it caused fdo#44292. This second attempt fixes the original bug
again, without introducing the "4 columns" bug.

Change-Id: I75d612430a5cd631dec0d224127cba580070900d

writerfilter/source/dmapper/DomainMapper.cxx

@@ -2369,7 +2369,12 @@ void DomainMapper::sprmWithProps( Sprm& rSprm, PropertyMapPtr rContext, SprmType
         */
         OSL_ENSURE(pSectionContext, "SectionContext unavailable!");
         if(pSectionContext)
-            pSectionContext->SetBreakType( nIntValue );
+        {
+            // Ignore continous section break at the end of the document
+            // It makes the importer loose margin settings with no benefit
+            if (m_pImpl->GetParaSectpr() || nIntValue != 0)
+                pSectionContext->SetBreakType( nIntValue );
+        }
         break;
     case 143:
     case NS_sprm::LN_SFTitlePage: // sprmSFTitlePage