From 158fe327cb46e318a296daa42cf99e911f680222 Mon Sep 17 00:00:00 2001
From: Baldur Kristinsson <baldur.kristinsson@gmail.com>
Date: Tue, 26 Jan 2016 08:46:50 +0000
Subject: [PATCH] Avoid 'Use of unitialized value' warning when 'pandoc_math'
 is not configured

---
 pandoc.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pandoc.pm b/pandoc.pm
index 15f1b6b..e9486be 100755
--- a/pandoc.pm
+++ b/pandoc.pm
@@ -266,7 +266,7 @@ sub htmlize ($@) {
         jsmath mathjax latexmathml asciimathml mathml katex mimetex webtex
     );
     my %with_urls = qw/mimetex 1 webtex 1/;
-    my $mathopt = $1 if $config{pandoc_math} =~ /(\w+)/;
+    my $mathopt = $1 if $config{pandoc_math} && $config{pandoc_math} =~ /(\w+)/;
     my $custom_js = $config{pandoc_math_custom_js} || '';
     if ($mathopt && $mathconf{$mathopt}) {
         if ($with_urls{$mathopt} && $custom_js) {
-- 
2.39.2