poll: Added a workaround for AIX to get it to notice IO_ERRORs
poll: Added a workaround for AIX to get it to notice IO_ERRORs

jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot