Possible memory leak fix

gistfile1.txt

bool stopPlaying() {
    bool stopped = false;
    if (rtttl) {
        rtttl->stop();
        delete rtttl;
        rtttl = nullptr;
        stopped = true;
    }
    if (mp3) {
        mp3->stop();
        delete mp3;
        mp3 = nullptr;
        stopped = true;
    }
    if (buff) {
        buff->close();
        delete buff;
        buff = nullptr;
    }
    if (file) {
        file->close();
        delete file;
        file = nullptr;
    }
    if (stream) {
        stream->close();
        delete stream;
        stream = nullptr;
    }

    return stopped;
}