assert ((int) seqnum == seq_getnum (oldmp, *seq));
if (in_sequence (oldmp, seqnum, oldmsgnum)) {
seq_addmsg (newmp, *seq, newmsgnum,
assert ((int) seqnum == seq_getnum (oldmp, *seq));
if (in_sequence (oldmp, seqnum, oldmsgnum)) {
seq_addmsg (newmp, *seq, newmsgnum,