[Qt-creator] Zombie processes

[Kris Wong]

I had been running creator for several hours yesterday when I happened to
take a look at the process list. Creator had probably around 30 - 40 defunct
child processes from running my application. This is likely due to an issue
with QProcess, which allows these defunct child processes to hang around.
We actually use a subclass of QProcess here, which takes care of this problem.

Kris Wong