While setting the size of that Hide_pid array to equal
total pids high water mark was probably safe, in truth
there is no real relationship. At some point one could
exceed that HWM if the 'v' toggle was used extensively
and at least 1 of those entries remained non-negative.

This commit simply divorces Hide_tot from the pids HWM
and bases Hide_pid array size on actual run-time need.

Signed-off-by: Jim Warner <james.warner@comcast.net>