changes to osf1_wait4() - only allocate rusage struct when caller wants rusage info - fix a stupid paren mismatch bug that was causing EPERM to get returned   to callers rather then ECHILD
changes to osf1_wait4()
- only allocate rusage struct when caller wants rusage info
- fix a stupid paren mismatch bug that was causing EPERM to get returned
  to callers rather then ECHILD

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