doc/list-exports.lisp: Don't get confused and thing `nil' isn't interned.

Check the correct value of `find-symbol', because `nil' is false.

diff --git a/doc/list-exports.lisp b/doc/list-exports.lisp
index f4cdfab..d566a1b 100644 (file)
--- a/doc/list-exports.lisp
+++ b/doc/list-exports.lisp
@@ -69,7 +69,7 @@
       (let ((home (car assoc)))
        (dolist (symbol (cdr assoc))
          (let ((name (symbol-name symbol)))
-           (unless (find-symbol name package)
+           (unless (nth-value 1 (find-symbol name package))
              (format *error-output* ";; unexported: ~S~%" symbol))
            (setf (gethash name homes) home)))))
     (dolist (symbol symbols)