Fix a bug : Search for previous operation failed

src/view/grid/GridAccount.cpp

@@ -733,6 +733,7 @@ void GridAccount::OnOperationModified(wxGridEvent& event)
          !GetCellValue(row, ACCOUNT).Length() ||
 	 !_canAddOperation))
     {
+	new_op.fix_cost = (row <= _fixCosts);
         if (_kiss->SearchPreviousOperation(&op_tmp, new_op, new_op.month, new_op.year, _canAddOperation))
 	{
             new_op.category = op_tmp.category;