Bugfix for interface.c

[Bruce]

Interesting your signature works!! That must be the most obscure
welcome message ever!
Regards,
Bruce.


>The bugfix for the described problem is attached.
>
>Greetings,
>ka.i
>--
>perl -e '@_=(0110,0101|010<<0<<1<<0<<1,1<<1<<1<<0<<1<<1<<1<<0<<1|11*1<<1<<1
>,0110|0100>>1|1<<1<<1,111,11*010>>1,010*1<<1<<1,11*010-1,101,(0100<<1)-(010
><<1|010>>1),(11>>1)+111,(1<<1<<1<<1<<1<<1)+1,010+(1<<1));printf"%c"x at _, at _'