Created Unassigned: XSSF中 ISheet.SetMargin导致文件损坏 [12631]

```
var _workbook = new XSSFWorkbook();
var _sheet = _workbook.CreateSheet();

// cause file damage
//_sheet.SetMargin(MarginType.TopMargin, 0);

var _row=_sheet.CreateRow(0);
_row.CreateCell(0).SetCellValue(DateTime.Now.ToShortDateString());
using (var fs = new FileStream("out.xlsx", FileMode.Create))
{
_workbook.Write(fs);
}
```