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

LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot