Get count on media list items
    The L{libvlc_media_list_lock} should be held upon entering this function.
    @param p_ml: a media list instance.
    @return: number of items in media list.

def libvlc_media_list_count(p_ml):
    '''Get count on media list items
    The L{libvlc_media_list_lock} should be held upon entering this function.
    @param p_ml: a media list instance.
    @return: number of items in media list.
    '''
    f = _Cfunctions.get('libvlc_media_list_count', None) or \
        _Cfunction('libvlc_media_list_count', ((1,),), None,
                    ctypes.c_int, MediaList)
    return f(p_ml)