1.x: NullPointerException in OperatorSwitch

[artem-zinnatullin]

Reported from app version with RxJava 1.1.3, but OperatorSwitch was not changed since 1.1.3 so it still looks actual.

Caused by java.lang.NullPointerException
rx.internal.operators.OperatorSwitch$SwitchSubscriber.drain (OperatorSwitch.java:316)
rx.internal.operators.OperatorSwitch$SwitchSubscriber.childRequested (OperatorSwitch.java:266)
rx.internal.operators.OperatorSwitch$SwitchSubscriber$2.request (OperatorSwitch.java:124)
rx.Subscriber.request (Subscriber.java:157)
rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.call (OperatorObserveOn.java:220)
rx.internal.schedulers.ScheduledAction.run (ScheduledAction.java:55)

On the line: if (localIndex.get() == inner.id) {

localIndex is final, so looks like inner is null.

// JFYI it was on Samsung with Android 6.0.1.

[akarnokd]

This appears to be a bug with the JCTools queue. The fix is simply swap two operations in 3 places, but before I post the fix, I'll sort this out with JCTools.

[akarnokd]

Fix in #4005.

[akarnokd]

Fix delivered in 1.1.6. Thanks!