Logged In: YES 
user_id=1080231

A solution could be:

Line 217:
    if not messageid:
Change into:
    if msgid is not None and not messageid:

Lines 255-256:
    # add the content
    m.appen(messages.safeget(msgid, 'content', ''))
Change into:
    # add the content
    if msgid is not None:
        m.appen(messages.safeget(msgid, 'content', ''))