Log Message:
Update ast-ksh (and static-ast-ksh) to version 20030724.

Changes since 20030621:
* A bug in which could cause memory corruption when a posix
  function invoked another one has been fixed.
* A bug in which a file descriptor>2 could be closed before
  executing a script has been fixed.
* A parsing error for <() and >() process subsitituions inside
  command substitution has been fixed.
* A parsing error for patterns of the form {...}(...) when
  used inside ${...} has been fixed.
* An error in which expanding an indexed array inside a compound
  variable could cause a core dump has been fixed.
* A bug in which under on rare ocassions a job completion interrupt
  could cause to core dump has been fixed.
* A bug in which process substitution embeded within command
  substitution would generate a syntax error has been fixed.

This update does also fix the build problems on NetBSD-current reported
by Steven M. Bellovin in PR pkg/22422.