Adjust variable

Closes #3450873

src/Service/HootsuitePostManager.php

@@ -310,7 +310,7 @@ class HootsuitePostManager implements HootsuitePostManagerInterface {
       'sizeBytes' => filesize($image->getFileUri()),
     ];
     $response = $this->hootsuiteClient->connect('post', $this->config->get('url_post_media_endpoint'), NULL, $body);
-    if (empty($result)) {
+    if (empty($response)) {
       return FALSE;
     }
     $data = Json::decode($response);