Ensure MediaFile.__unicode__ is not empty (or whitespace only)
Ensure MediaFile.__unicode__ is not empty (or whitespace only)

matthiask/feincms2-content,joshuajonah/feincms,matthiask/django-content-editor,michaelkuty/feincms,feincms/feincms,mjl/feincms,michaelkuty/feincms,joshuajonah/feincms,feincms/feincms,matthiask/django-content-editor,matthiask/feincms2-content,pjdelport/feincms,nickburlett/feincms,mjl/feincms,nickburlett/feincms,nickburlett/feincms,joshuajonah/feincms,pjdelport/feincms,michaelkuty/feincms,mjl/feincms,feincms/feincms,nickburlett/feincms,matthiask/feincms2-content,joshuajonah/feincms,pjdelport/feincms,matthiask/django-content-editor,matthiask/django-content-editor,michaelkuty/feincms