From 6736ba9a047710c03a58197183fba4c4a3db94bd Mon Sep 17 00:00:00 2001
From: Gareth Evans <garoevans@gmail.com>
Date: Mon, 20 Apr 2015 16:24:11 +0100
Subject: [PATCH] Fix check against $matches

Fixes inline reference links with int 0 as reference

The link [link][0] where [0] is set at the bottom of the md file current breaks and it's truthy value is false.
---
 Parsedown.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Parsedown.php b/Parsedown.php
index 9bdae22..87c10a6 100755
--- a/Parsedown.php
+++ b/Parsedown.php
@@ -1212,7 +1212,7 @@ class Parsedown
         {
             if (preg_match('/^\s*\[(.*?)\]/', $remainder, $matches))
             {
-                $definition = $matches[1] ? $matches[1] : $Element['text'];
+                $definition = strlen($matches[1]) ? $matches[1] : $Element['text'];
                 $definition = strtolower($definition);
 
                 $extent += strlen($matches[0]);