Logspam is spam

This turns out to happen a lot in normal usage, but we're logging
copiously about it each time.  It's reporting "oh hey we're already
in this state" -- and so the log is not useful anyway.

Logspam is spam.

Bug 15169507

Change-Id: Ie2d01ff1b0b3600dd9c15ccf83d60875558f1dc2