Function uplGetThumbnail
Returns thumbnail for a specific upload file
		
		Package: Core\Backend
Copyright: four for business AG <www.4fb.de>
License: http://www.contenido.org/license/LIZENZ.txt
Author: Jan Lengowski
Author: Timo Trautmann
Located at includes/functions.upl.php
	
	Copyright: four for business AG <www.4fb.de>
License: http://www.contenido.org/license/LIZENZ.txt
Author: Jan Lengowski
Author: Timo Trautmann
Located at includes/functions.upl.php
string | 
		$sFile | 
		Filename to retrieve the thumbnail for | 
integer | 
		$iMaxSize | 
		Thumb dimension (size of with and heigth) | 
			string
		 |