fix bogus ECHILD return from wait* with zombie group leader
I got up today a realized that I really needed to finish trimming my hedges. Knowing it was 95 degrees yesterday I figured I should get an early start on it. It was 68 degrees at 9:45 when I started so I figured it wouldn't be too hot. Fifteen minutes later I was sweating like a pig. It wasn't hot outside, but standing in that sun it was sure warm. It's not hot yet, but it's gonna be really hot today. Time to find some nice air conditioning and just stay there all day.