if (Imap->num_msgs > Imap->num_alloc) {
Imap->num_alloc += REALLOC_INCREMENT;
Imap->msgids = realloc(Imap->msgids, (Imap->num_alloc * sizeof(long)) );
if (Imap->num_msgs > Imap->num_alloc) {
Imap->num_alloc += REALLOC_INCREMENT;
Imap->msgids = realloc(Imap->msgids, (Imap->num_alloc * sizeof(long)) );