[BUGS] 7.3 pg_atoi action

[mlane]

PG Development Team,   I would first like to commend all of you on the fantastic service you provide the general public. My first and only complaint is the recent modification to the action pg_atoi( ) takes on empty string sets.  (7.3 modification).    If possible, could we rollback this change on 7.4 with maybe a compilation option?   Thank you,   Mark Lane