flowables.py: fix no PIL jpg problem reported by Martin.Zohlhuber@tttech.com
flowables.py: fix no PIL jpg problem reported by Martin.Zohlhuber@tttech.com

makinacorpus/reportlab-ecomobile,makinacorpus/reportlab-ecomobile,makinacorpus/reportlab-ecomobile,makinacorpus/reportlab-ecomobile,makinacorpus/reportlab-ecomobile