sc-perf: avoid second call to ScAttrArray::Search(), tdf#87101 related

In that scenario, of 36791233 calls only 9217 were necessary as most times
nRow2 equals nRow1.

Change-Id: I14228d065175addee76b9142c98110efe59701e7

sc/source/core/data/attarray.cxx

@@ -1199,7 +1199,10 @@ bool ScAttrArray::HasAttrib( SCROW nRow1, SCROW nRow2, HasAttrFlags nMask ) cons
     SCSIZE nStartIndex;
     SCSIZE nEndIndex;
     Search( nRow1, nStartIndex );
-    Search( nRow2, nEndIndex );
+    if (nRow1 != nRow2)
+        Search( nRow2, nEndIndex );
+    else
+        nEndIndex = nStartIndex;
     bool bFound = false;
 
     for (SCSIZE i=nStartIndex; i<=nEndIndex && !bFound; i++)