Created Unassigned: System.Runtime.InteropServices.ExternalException while Adding DataTable to WorkSheet [9398]

Hi,

Somehow while converting DataTable to WorkSheet, I am getting this exception. Not sure what exactly is causing this.

```
A first chance exception of type 'System.Runtime.InteropServices.ExternalException' occurred in System.Drawing.dll
System.Runtime.InteropServices.ExternalException (0x80004005): A generic error occurred in GDI+.
at System.Drawing.Graphics.MeasureString(String text, Font font, SizeF layoutArea, StringFormat stringFormat)
at System.Drawing.Graphics.MeasureString(String text, Font font, Int32 width, StringFormat format)
at ClosedXML.Utils.GraphicsUtils.MeasureString(String s, Font font)
at ClosedXML.Excel.FontBaseExtensions.GetWidth(IXLFontBase fontBase, String text, Dictionary`2 fontCache)
at ClosedXML.Excel.XLColumn.AdjustToContents(Int32 startRow, Int32 endRow, Double minWidth, Double maxWidth)
at ClosedXML.Excel.XLColumn.AdjustToContents(Int32 startRow, Int32 endRow)
at ClosedXML.Excel.XLColumns.<>c__DisplayClasse.<AdjustToContents>b__d(XLColumn c)
at System.Collections.Generic.List`1.ForEach(Action`1 action)
at ClosedXML.Excel.XLColumns.AdjustToContents(Int32 startRow, Int32 endRow)
at ClosedXML.Excel.XLWorksheets.Add(DataTable dataTable, String sheetName)
at XXXXX A first chance exception of type 'System.Runtime.InteropServices.ExternalException' occurred in XXXXX
```

Code Sample:
```
// Creating Excel workbook
var wb = new XLWorkbook(XLEventTracking.Disabled);
var dataSheet = wb.Worksheets.Add(dataTable, "Data");
```

The DataTable includes some null or empty cells as well as strings in different scripts like Chinese, Arabic, etc.

Any idea what might be the reason for this.