Fix error C14N

I have the error:
"Call to a member function C14N() on null"

You could reproduce like this:
	- try to parse a url like http://www.dailymotion.com/video/x6ga6qi that doesn't return any content
	- this throw an exception and the logs show  "[Parsing] Could not parse text, giving up :("
	- now, call ->getContent() with the same object readability

Previously, getContent would return "null" but now it call ->C14N() on a NULL object.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/Readability.php b/src/Readability.php
index 91e703c..cffe4f0 100644
--- a/src/Readability.php
+++ b/src/Readability.php
@@ -1564,7 +1564,7 @@ class Readability
      */
     public function getContent()
     {
-        return $this->content->C14N();
+        return (null !== $this->content) ? $this->content->C14N() : null;
     }
 
     /**