forcepoint#49 survive more kashidas than expected

Change-Id: I66aa5389b3d80d1fe2f6898e8920eb37ca064381
Reviewed-on: https://gerrit.libreoffice.org/56468Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sw/source/core/text/itradj.cxx

@@ -132,9 +132,10 @@ static bool lcl_CheckKashidaPositions( SwScriptInfo& rSI, SwTextSizeInfo& rInf,
 
     // kashida positions found in SwScriptInfo are not necessarily valid in every font
     // if two characters are replaced by a ligature glyph, there will be no place for a kashida
-    std::vector<TextFrameIndex> aKashidaPos(rKashidas);
-    std::vector<TextFrameIndex> aKashidaPosDropped(rKashidas);
+    std::vector<TextFrameIndex> aKashidaPos;
     rSI.GetKashidaPositions(nIdx, rItr.GetLength(), aKashidaPos);
+    assert(aKashidaPos.size() >= static_cast<size_t>(rKashidas));
+    std::vector<TextFrameIndex> aKashidaPosDropped(aKashidaPos.size());
     sal_Int32 nKashidaIdx = 0;
     while ( rKashidas && nIdx < nEnd )
     {

sw/source/core/text/porlay.cxx

@@ -1994,7 +1994,7 @@ void SwScriptInfo::GetKashidaPositions(
     {
         if ( nEnd <= GetKashida( nCntKashEnd ) )
             break;
-        rKashidaPosition[nCntKashEnd - nCntKash] = GetKashida(nCntKashEnd);
+        rKashidaPosition.push_back(GetKashida(nCntKashEnd));
         nCntKashEnd++;
     }
 }