segfaulting dvswitch when stream is missing

[Samuel Lucas Vaz de Mello]

>
> Ok, I did some more tests:
>  * plain build from the latest source from the site on an i386 setup,
> without any adaptions, it still segfaults.
>  * debian source compiled on amd64 (core2duo), I forced enc_thread_count
> to 1 in the mixer.cpp, it still segfaults.
>
> as I said, we had situations where it didn't segfault, but it almost
> always does.
>

Have you tried to run it inside gdb? It usually gives the backtrace
showing where the segfault happened.

- Samuel