--- loncom/interface/lonparmset.pm	2003/11/18 22:21:00	1.137
+++ loncom/interface/lonparmset.pm	2003/11/21 19:54:42	1.139
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Handler to set parameters for assessments
 #
-# $Id: lonparmset.pm,v 1.137 2003/11/18 22:21:00 albertel Exp $
+# $Id: lonparmset.pm,v 1.139 2003/11/21 19:54:42 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -131,12 +131,12 @@ sub parmval {
 
 # -------------------------------------------------------- first, check default
 
-    if ($def) { $outpar[11]=$def; $result=11; }
+    if (defined($def)) { $outpar[11]=$def; $result=11; }
 
 # ----------------------------------------------------- second, check map parms
 
     my $thisparm=$parmhash{$symbparm};
-    if ($thisparm) { $outpar[10]=$thisparm; $result=10; }
+    if (defined($thisparm)) { $outpar[10]=$thisparm; $result=10; }
 
 # --------------------------------------------------------- third, check course
 
@@ -1520,8 +1520,8 @@ sub crsenv {
              'courseid'       => '<b>Course ID or number</b><br />'.
                                  '(internal, optional)',
              'grading'        => '<b>Grading</b>'.
-                                 '"standard" or any other value.  '.
-                                 'Default for new courses is "standard".',
+                                 '"standard", "external", or any other value.'.
+                                 '  Default for new courses is "standard".',
 
              'default_xml_style' => '<b>Default XML Style File</b> '.
                     '<a href="javascript:openbrowser'.