Fix a corner case where the stack-trace "tree" mode was dropping frames.  If one process in the job had a short stack further processes in the job erronously got reported as short too.
Fix a corner case where the stack-trace "tree" mode
was dropping frames.  If one process in the job
had a short stack further processes in the job
erronously got reported as short too.

ashleypittman/padb,ashleypittman/padb,ashleypittman/padb