no badarg thrown by spawned process - quiet ext

[Sameer Pendse]

i am using r8b-1 on win2k.

in a spawned process, if i do a io:format("...~w",L) where L is a list, then
my spawned process exits without a badarg error. if i put the L in a [L], it
works fine. if i do the badop in a top-level process, i do get the badarg
error.

i thought this bug was resolved in 8b-1.