MythDownloadManager: make sure the cookieJar is created in the right …

…thread.

The cookieJar is created the first time it is accessed. This just makes sure
it it is created in the same thread as the QNetworkAccessManager otherwise Qt
starts to complain.

mythtv/libs/libmythbase/mythdownloadmanager.cpp

@@ -199,6 +199,8 @@ void MythDownloadManager::run(void)
                                    gCoreContext->GetHostName());
     m_manager->setCache(m_diskCache);
 
+    // make sure the cookieJar is created in the same thread as the manager
+    m_manager->cookieJar();
 
     QObject::connect(m_manager, SIGNAL(finished(QNetworkReply*)), this,
                        SLOT(downloadFinished(QNetworkReply*)));