pubsub_affiliation_new: log more clearly if @node is NULL
pubsub_affiliation_new: log more clearly if @node is NULL

Ahem.

noonien-d/wocky,freedesktop-unofficial-mirror/wocky,noonien-d/wocky,noonien-d/wocky,freedesktop-unofficial-mirror/wocky,freedesktop-unofficial-mirror/wocky