ReplaySubject memory leak

[stackfull]

This little baby will grind to a halt do due never letting go of the events:

import rx.subjects.ReplaySubject;

public class Application {
  public static void main(String[] args) {
    ReplaySubject<Integer> subject = ReplaySubject.createWithSize(10);
    subject.subscribe(x -> {});
    int ii = 0;
    while(true) {
      subject.onNext(ii);
      ii++;
    }
  }
}

[stackfull]

tested on 1.0.0-rc.10

[benjchristensen]

I merged the fix.