crashtesting: failure importing tdf118662-1.xlsx

with dynamic columns

Change-Id: I1f2ed918932066d8b0def57568f5dc23be3605e4
Reviewed-on: https://gerrit.libreoffice.org/72028
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sc/source/core/data/table2.cxx

@@ -1597,7 +1597,7 @@ ScFormulaCell* ScTable::GetFormulaCell( SCCOL nCol, SCROW nRow )
 
 std::unique_ptr<ScPostIt> ScTable::ReleaseNote( SCCOL nCol, SCROW nRow )
 {
-    if (!ValidCol(nCol))
+    if (!ValidCol(nCol) || nCol >= GetAllocatedColumnsCount())
         return nullptr;
 
     return aCol[nCol].ReleaseNote(nRow);