From ef333300a20b7412176525e542b5fd61ef776e94 Mon Sep 17 00:00:00 2001
From: Hakim El Hattab <hakim.elhattab@gmail.com>
Date: Wed, 25 Jun 2014 11:50:31 +0200
Subject: [PATCH] prevent additional inaccurate showSlide calls

---
 js/reveal.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/js/reveal.js b/js/reveal.js
index ae35bf0..2355098 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -2146,7 +2146,7 @@
 			distanceX,
 			distanceY;
 
-		if( horizontalSlidesLength ) {
+		if( horizontalSlidesLength && typeof indexh !== 'undefined' ) {
 
 			// The number of steps away from the present slide that will
 			// be visible