Fix more functions in util/ack for 64-bit hosts.
Fix more functions in util/ack for 64-bit hosts.

This continues the fix from changeset aabde0589450.  We must use
va_list to forward the arguments, because some of the arguments might
be 64-bit pointers.  A pointer does not fit in an int.

Godzil/ack,Godzil/ack,Godzil/ack,Godzil/ack,Godzil/ack