bug#4957: 23.1.50; idlwave activated spuriously

[Richard Stallman]

    No I don't, because bootstrapping starts a new Emacs instance to
    compile every file in a pure environment. They exit when done, so
    never hang around for 10 seconds of idle time to allow this code to
    run. I thought you said you did a recompile, which is different and
    compiles everything in a single Emacs instance.

I think this occurred during a bootstrap.  But I can't be sure
of that memory after the time that has gone by.