#i118877# (author=debin.lei@gmail.com) fix Calc crash when Redo refreshes data

sc/source/core/data/table3.cxx

@@ -420,12 +420,16 @@ void ScTable::SwapCol(SCCOL nCol1, SCCOL nCol2)
             const ScPatternAttr* pPat1 = GetPattern(nCol1, nRow);
             const ScPatternAttr* pPat2 = GetPattern(nCol2, nRow);
             if (pPat1 != pPat2)
+            {
+                //maybe the content is the same
+                if (!(*pPat1 == *pPat2))
                 {
                     SetPattern(nCol1, nRow, *pPat2, sal_True);
                     SetPattern(nCol2, nRow, *pPat1, sal_True);
                 }
             }
         }
+    }
 }
 
 void ScTable::SwapRow(SCROW nRow1, SCROW nRow2)
@@ -438,12 +442,16 @@ void ScTable::SwapRow(SCROW nRow1, SCROW nRow2)
             const ScPatternAttr* pPat1 = GetPattern(nCol, nRow1);
             const ScPatternAttr* pPat2 = GetPattern(nCol, nRow2);
             if (pPat1 != pPat2)
+            {
+                //maybe the content is the same
+                if (!(*pPat1 == *pPat2))
                 {
                     SetPattern(nCol, nRow1, *pPat2, sal_True);
                     SetPattern(nCol, nRow2, *pPat1, sal_True);
                 }
             }
         }
+    }
     if (bGlobalKeepQuery)
     {
         bool bRow1Hidden = RowHidden(nRow1);