pausableBuffered produces incorrect results if you send an initial false signal after first sending some data

[bman654]

This code shows the behavior:

    var data = new Rx.Subject();
    var signal = new Rx.Subject();
    var p = data.pausableBuffered(signal);
    var results = [];
    p.subscribe(function (value) { results.push(value); });

    data.onNext(1);
    signal.onNext(false);
    signal.onNext(true); // causes two 1's to be observed

Here's a jsFiddle with a QUnit test: http://jsfiddle.net/bman654/9vmccse4/1/