[PATCH] nmbug: check whether every forked process exit with (non)zero value

[David Bremner]

Tomi Ollila <tomi.ollila at iki.fi> writes:

> If any of the forked process exits with nonzero value, terminate
> current operation -- nonzero exit value indicates failure and
> then there is no point continuing.

Pushed.

Ironically I'm still not too sure about the merge strategy thing, I hope
I have some time to test it more, but at the moment I forget how to
reliable get a conflict.

d