when uploaded file has no extension upload failes (type cannot be empty in model)

[tsdogs]

I know this might not be of much use to many, though if the uploaded file has no extension the upload fails 'cause the type (fileType) field is empty and this is not allowed...

Using windows this probably would never get triggered, though using linux as a client it might create problems (as files are not interpreted by the extension but by it's content mimetype)