[Rd] potential setClass bug (with user-defined environment)

[Parlamis Franklin]

the following returns an error in an 'exists' call on my machine

MyEnv <- new.env()
setClass("Numeric", "numeric", where=MyEnv)

franklin parlamis

 > version
                _
platform       powerpc-apple-darwin8.7.0
arch           powerpc
os             darwin8.7.0
system         powerpc, darwin8.7.0
status         beta
major          2
minor          4.0
year           2006
month          09
day            22
svn rev        39471
language       R
version.string R version 2.4.0 beta (2006-09-22 r39471)