ps->sample = ps->sample->next;
sample_hz = ps->sample;
- for (ii=0;((ii<(int)arg_hz/2)&&(ps->sample->next));ii++)
+ for (ii=0;((ii<(int)arg_hz/2)&&(sample_hz->next));ii++)
sample_hz = sample_hz->next;
/* subtract bootchart cpu utilization from total */