Fix crash adding metadata to jpg from MS Paint

[papeh]

This change is 

[papeh]

Only this file (star.jpg, created with mspaint on Windows 10) causes the crash. Another jpg created with mspaint on Windows 11 does not.

Steps:

• Debug the SIL.Windows.Forms.TestApp
• Place a breakpoint on the last line of ImageToolboxControl.SetNewImageMetadata(Metadata)
• Click Image Toolbox
• Choose fichier (file) and navigate to star.jpg
• Click Configure matadata; enter metadata; and click OK
• When stopped on the breakpoint, run the risky commented line _imageInfo.SaveUpdatedMetadataIfItMakesSense(); Notice: TagLib.File.Create(path) will throw a CorruptFileException: 'Expected SOI marker at the start of the file.'

I created this file hastily in mspaint on a VM and used a shared drive to get it onto my host machine.