ports/71591: audio/funktrackergold segfaults

[Simon Barner]

>  The more interesting point is why the following little C program fails
>  (please forgive me if I am overlooking something really stupid ;-)
>  
>  (please note that this works fine for other environment variables like
>  HOME, PAGER, ...)

To answer my own question: The OSTYPE variable is not exported, while
HOME, PAGER, etc. are. Note the difference of the output of `set' and
`export'.

So, I guess, my patch is a valid solution to the problem. If noone
noticed this problem so far, I wonder how many user of this port exists ;-)