From 7a141091c871f6446a68f9a5623dba2efb54873a Mon Sep 17 00:00:00 2001
From: Andrey Kotlarski <m00naticus@gmail.com>
Date: Mon, 26 Aug 2013 12:29:39 +0300
Subject: [PATCH] Fix search for GNU Emacs 23 (no assert).

---
 vlf.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/vlf.el b/vlf.el
index 5a2ce16..b5c7f3e 100644
--- a/vlf.el
+++ b/vlf.el
@@ -439,7 +439,8 @@ bytes added to the end."
 (defun vlf-re-search (regexp count backward batch-step)
   "Search for REGEXP COUNT number of times forward or BACKWARD.
 BATCH-STEP is amount of overlap between successive chunks."
-  (assert (< 0 count))
+  (if (<= count 0)
+      (error "Count must be positive"))
   (let* ((match-chunk-start vlf-start-pos)
          (match-chunk-end vlf-end-pos)
          (match-start-pos (+ vlf-start-pos (position-bytes (point))))