perf stat: Set child_pid after perf_evlist__prepare_workload()
The commit acf28922 ("perf stat: Use perf_evlist__prepare/ start_workload()") converted to use the function but forgot to update child_pid. Fix it. Signed-off-by:Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1380531671-28076-1-git-send-email-namhyung@kernel.org Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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