(bug 57532)  Topics started by an IP show as "Topic started by [current user's IP]"

No strict comparison against id

User id may be string '0', in which case User::newFromId( '0' ) will be the
creator. getName() will then default to request IP, instead of creator IP

Bug: 57532
Change-Id: I9f989a39ca318e618f5527b353967e0309b3d6fa
Merge "(bug 57532)  Topics started by an IP show as "Topic started by [current user's IP]""