Fix 500 when saving /site/edit without email When saving /site/edit with no no_reply_email set, a 500 error page would be returned due to an empty value being passed as value to the datastore (which is not allowed for email fields).

[nosetests]
exclude=pymox
with-coverage=1
cover-package=soc
cover-erase=1
cover-html=1
cover-html-dir=coverageResults
#debug=nose.plugins.cover