After the poll call, the code updates all the event objects
in the array. Instead, use the integer value returned by poll
to limit the number of epoll_event objects that are updated.
e.g. If poll returns 5, we know that we only need to update
5 event objects.
PR-URL: https://github.com/libuv/libuv/pull/1391
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
cbac5f1693