Get the script type in an efficient manner.

This alone makes AdjustRowHeight() fly on large ranges, by eliminating
the silly O(n^2) algorithm.

Change-Id: Id2693aab7fb9b2a5575c6390fcaae5a404549962

sc/source/core/data/column2.cxx

@@ -781,9 +781,10 @@ void ScColumn::GetOptimalHeight(
 
                     SCSIZE nIndex;
                     Search(nStart,nIndex);
+                    sc::CellTextAttrStoreType::iterator itAttr = maCellTextAttrs.begin();
                     while ( nIndex < maItems.size() && (nRow=maItems[nIndex].nRow) <= nEnd )
                     {
-                        sal_uInt8 nScript = pDocument->GetScriptType(nCol, nRow, nTab);
+                        sal_uInt8 nScript = GetRangeScriptType(itAttr, nRow, nRow);
                         if ( nScript != nDefScript )
                         {
                             if ( nScript == SCRIPTTYPE_ASIAN )