(CLJS) timeout timers skiplist is naive linked list

The skip list for the cljs timers has a bug which is readily apparent: a loop without a recur:

This is from the `put` function. This ordinarily would be a terrible bug except that the link at 0 is just the naive linked-list link and it omits the "skips" of the skip list. A trivial patch fixes this to recur from the when form.

This has an implication to the ceilingEntry function however:

This function allows to "overshoot" the key you are searching for, presumably finding the "next" node. With a simple linked list this is fine and well-defined. However, with a skip list, this allows for drastic and non-deterministic overshooting depending on how big a skip is.

This needs to be patched to only overshoot when in the lowest linked list and not in any of the skip list links.