do not override _width and _height if file is not ready yet
do not override _width and _height if file is not ready yet

webu/django-filer,skirsdeda/django-filer,divio/django-filer,webu/django-filer,divio/django-filer,divio/django-filer,webu/django-filer,divio/django-filer,skirsdeda/django-filer,skirsdeda/django-filer,webu/django-filer,skirsdeda/django-filer,skirsdeda/django-filer