Don't serialize out null subscriptions
Don't serialize out null subscriptions

piratas-ar/loomio,loomio/loomio,mhjb/loomio,sicambria/loomio,sicambria/loomio,sicambria/loomio,loomio/loomio,piratas-ar/loomio,piratas-ar/loomio,sicambria/loomio,loomio/loomio,mhjb/loomio,mhjb/loomio,loomio/loomio,piratas-ar/loomio,mhjb/loomio