Fix popularity data submission in the backend FS#2808

The POST data contained the raw data instead of an array with the data
that should be submitted like in the requests from the browser. The
server backend has been fixed to be able to process both versions.

lib/plugins/popularity/helper.php

@@ -85,7 +85,7 @@ class helper_plugin_popularity extends Dokuwiki_Plugin {
     function sendData($data){
         $error = '';
         $httpClient = new DokuHTTPClient();
-        $status = $httpClient->sendRequest($this->submitUrl, $data, 'POST');
+        $status = $httpClient->sendRequest($this->submitUrl, array('data' => $data), 'POST');
         if ( ! $status ){
             $error = $httpClient->error;
         }