fix for sasl and sys:get_status

[Steve Vinoski]

I've implemented a fix for the problem Paul Guyot reported recently
about the broken use in sasl of the term returned from calling
sys:get_status on a supervisor:

git fetch git://github.com/vinoski/otp.git sasl_fix_get_status

There are no doc changes required, and I couldn't run the sasl tests
since they're not publicly available, but the change is very
straightforward.

--steve