dont ignore checker body if not evaluating submission

svn: r1029

collects/handin-server/doc.txt

@@ -674,6 +674,9 @@ Keywords for configuring `check:':
   below).
 
 * :eval? -- whether submissions should be evaluated.  Defaults to #t.
+  Note that if it is specified as #f, then the checker body will not
+  be able to run any tests on the code, unless it contains code that
+  performs some evaluation (eg, using the facilities of "utils.ss").
 
 * :language -- the language that is used for evaluating submissions,
   same as the `language' argument for `make-evaluator' (see above).

collects/handin-server/extra-utils.ss

@@ -349,7 +349,7 @@
                                           body*1 body* (... ...))])])
                          (let () body ...))
                        (when (thread-cell-ref added-lines) (write-text))))]
-                  [(not eval?) #t]
+                  [(not eval?) (let () body ...)]
                   [else (error* "no language configured for submissions")])
                  output-file)
                ;; ========================================