- Renew any annulled message tokens in the current context
Any message tokens which have been annulled (by a call to MSG_OUT,
ERR_REP, etc.) are renewed unless any new token value has
been defined (using MSG_SETx, MSG_FMTxetc.) since
the previous tokens were annulled.
The intended use of MSG_RENEW is to allow a set of message token
values to be used repeatedly in a sequence of messages without having
to re-define them each time.