Sets the LibVLC error status and message for the current thread.
    Any previous error is overridden.
    @param fmt: the format string.
    @param ap: the arguments.
    @return: a nul terminated string in any case.

def libvlc_vprinterr(fmt, ap):
    '''Sets the LibVLC error status and message for the current thread.
    Any previous error is overridden.
    @param fmt: the format string.
    @param ap: the arguments.
    @return: a nul terminated string in any case.
    '''
    f = _Cfunctions.get('libvlc_vprinterr', None) or \
        _Cfunction('libvlc_vprinterr', ((1,), (1,),), None,
                    ctypes.c_char_p, ctypes.c_char_p, ctypes.c_void_p)
    return f(fmt, ap)