Issue #1636024 by Dmitriy.trt: Fixed Warning on enabled cache and no JS added.

plugins/views_plugin_cache.inc

@@ -230,7 +230,9 @@ function gather_headers() {
     $this->storage['js'] = array_diff_assoc($js, $js_start);
 
     // Special case the settings key and get the difference of the data.
-    $this->storage['js']['settings'] = array_diff_assoc($js['settings']['data'], $js_start['settings']['data']);
+    $settings = isset($js['settings']['data']) ? $js['settings']['data'] : array();
+    $settings_start = isset($js_start['settings']['data']) ? $js_start['settings']['data'] : array();
+    $this->storage['js']['settings'] = array_diff_assoc($settings, $settings_start);
   }
 
   /**

tests/views_cache.test

@@ -163,9 +163,6 @@ class ViewsCacheTest extends ViewsSqlTest {
       'type' => 'time',
       'output_lifespan' => '3600',
     ));
-    // @todo The cache plugin expects settings['data'] to be set.
-    // Maybe the cache plugin should be changed.
-    drupal_add_js('setting', array('example' => ''));
 
     $view->preview();
     $view->destroy();