From 8e52fe2d3f46f21f64a4fd766b1f8f403a3e57df Mon Sep 17 00:00:00 2001
From: Key Shang <arthur2sereno@gmail.com>
Date: Mon, 12 Aug 2019 16:13:59 +0800
Subject: [PATCH] Fix list function exception - Undefined offset

When location doesn't set, $value is empty string '', which result in list function exception - Undefined offset.
---
 Observer/AddBlock.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Observer/AddBlock.php b/Observer/AddBlock.php
index 692fc1a..f5fd167 100644
--- a/Observer/AddBlock.php
+++ b/Observer/AddBlock.php
@@ -87,6 +87,9 @@ public function execute(Observer $observer)
             foreach ($this->helperData->getActiveSliders() as $slider) {
                 $locations = explode(',', $slider->getLocation());
                 foreach ($locations as $value) {
+                    if(!$value) {
+                        continue;//when location doesn't set, $value is ''
+                    }
                     list($pageType, $location) = explode('.', $value);
                     if (($fullActionName === $pageType || $pageType === 'allpage') &&
                         strpos($location, $type) !== false