avoid flush() after stop() on WiFiClient

src/Audio.cpp

@@ -334,9 +334,7 @@ void Audio::setDefaults() {
     vector_clear_and_shrink(m_playlistContent);
     m_hashQueue.clear(); m_hashQueue.shrink_to_fit(); // uint32_t vector
     client.stop();
-    client.flush(); // release memory
     clientsecure.stop();
-    clientsecure.flush();
     _client = static_cast<WiFiClient*>(&client); /* default to *something* so that no NULL deref can happen */
     ts_parsePacket(0, 0, 0); // reset ts routine