top: correct a flaw in the support for pids monitoring
Ever since top was adapted to the new <pids> interface
there has been a bug that would cause an abnormal exit
when the '-p' argument contained *no* valid pids. This
was never revealed until now since the QA folks tested
only with valid, existing pids. (bunch of morons, eh?)
And even though the program author is blameless he has
taken it upon himself to clean up after the QA jokers.
Signed-off-by: Jim Warner <james.warner@comcast.net>