Upvalues problem solved

[Reuben Thomas <rrt1001@...>]

Sorry again, I must be in a stupid mood: I pop the upvalues immediately and
then can read the arguments as normal, just as in iolib.

-- 
http://sc3d.org/rrt/ | egrep, n.  a bird that debugs bison