bug in 12/7 pcl under ibcl and kcl

[Diana Smetters <diana@cis.ohio-state.edu>]

In the 12/7 release of pcl I get the following bug under 
kcl (June 3, 1987 version) and ibcl (release 01/01, on
both sun 3's and sun 4's):

If you load pcl as source, there are no problems. If you compile
it, you get no errors in compiling pkg.lsp. However, if you load
the compiled pcl, it breaks while loading pkg.o when trying to
evaluate the form

(export *exports* *the-pcl-package*)

saying that *exports* is unbound. *Exports* is defvar'ed immediately
previous to this form, and the defvar is wrapped inside an
(eval-when (compile load eval)...). If you load the source of
pkg form inside the break, then continue retrying the access of
the value of *exports*, everything is fine.