Reactive-Extensions/RxJS — pull request #286 by urmastalimaa (2014-09-23 15:25:45+00:00)
Title: Fix caching previousShouldFire in pausableBuffered

Assigning `previousShouldFire = results.shouldFire;` must be done immediately.

Otherwise the call to `observer.onNext` can fire another call to the
`subscribe` callback before `previousShouldFire` was assigned creating an erroneous result in
`if (previousShouldFire !== undefined && results.shouldFire != previousShouldFire)`