kqueue fixed alloc type.

refs #1291

src/common/fdset_kqueue.c

@@ -133,9 +133,9 @@ int fdset_kqueue_remove(fdset_t *fdset, int fd)
 	--fdset->nfds;
 
 	/* Trim excessive memory if possible (retval is not interesting). */
-	mreserve((char **)&fdset->events, sizeof(struct epoll_event),
+	mreserve((char **)&fdset->events, sizeof(struct kevent),
 	         fdset->nfds, OS_FDS_CHUNKSIZE, &fdset->reserved);
-	mreserve((char **)&fdset->revents, sizeof(struct epoll_event),
+	mreserve((char **)&fdset->revents, sizeof(struct kevent),
 	         fdset->nfds, OS_FDS_CHUNKSIZE, &fdset->rreserved);
 
 	return 0;