From 46527f7be865f09e1cc9ae02407d220f292785cc Mon Sep 17 00:00:00 2001
From: Chris <chris@example.com>
Date: Wed, 13 Apr 2016 08:24:59 +0100
Subject: [PATCH] Added check to see if menu link is set in manifest

---
 libraries/cms/installer/adapter.php | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/libraries/cms/installer/adapter.php b/libraries/cms/installer/adapter.php
index 38ada6de750e5..ded09904d3029 100644
--- a/libraries/cms/installer/adapter.php
+++ b/libraries/cms/installer/adapter.php
@@ -528,19 +528,22 @@ public function getManifest()
 	 */
 	public function getMenuLinkOption()
 	{
-		// Ensure the link is a string
-		$link = (string) $this->getManifest()->administration->menu->attributes()->link;
+		// Check if the link attribute is set
+		if (isset ($this->getManifest()->administration->menu->attributes()->link))
+		{
+			// Esnure the link is a string
+			$link = (string)$this->getManifest()->administration->menu->attributes()->link;
 
-		$delimiter = 'option=';
+			$delimiter = 'option=';
 
-		// Checks delimiter is in the link string
-		if (strpos($link, $delimiter) !== false)
-		{
-			// Gets the option from the link attribute
-			$option = substr($link, strpos($link, $delimiter) + strlen($delimiter));
+			// Checks delimiter is in the link string
+			if (strpos($link, $delimiter) !== false) {
+				// Gets the option from the link attribute
+				$option = substr($link, strpos($link, $delimiter) + strlen($delimiter));
 
-			// Filter the option for illegal characters
-			$option = JFilterInput::getInstance()->clean($option, 'string');
+				// Filter the option for illegal characters
+				$option = JFilterInput::getInstance()->clean($option, 'string');
+			}
 		}
 
 		return $option;