Polish: use seq_inc() macro

src/fellow_log.c

@@ -1991,10 +1991,7 @@ logbuffer_recycle(struct fellow_fd *ffd, struct fellow_logbuffer *lbuf,
 	memset(&lbuf->dle_stats, 0, sizeof lbuf->dle_stats);
 	lbuf->logreg = logreg;
 	lbuf->state = LBUF_INIT;
-	//lbuf->id = seq_inc(ffd->logbuf_id);
-	lbuf->id = ((ffd->logbuf_id == 0) ?
-	    ffd->logbuf_id = 2, 1 :
-	    (typeof(ffd->logbuf_id))ffd->logbuf_id++);
+	lbuf->id = seq_inc(ffd->logbuf_id);
 	lbuf->seq = 1;
 	lbuf->flush_seq = 1;
 	lbuf->head_seq[0] = 0;