Fix gnc-help protocol and illustrate its use in the hello world report

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@22636 57a11ea4-9604-0410-9ed3-97b8803252fd

src/report/report-gnome/window-report.c

@@ -318,7 +318,10 @@ gnc_html_help_url_cb (const char *location, const char *label,
 {
     g_return_val_if_fail (location != NULL, FALSE);
 
-    gnc_gnome_help (location, label);
+    if (label && (*label != '\0'))
+        gnc_gnome_help (location, label);
+    else
+        gnc_gnome_help (location, NULL);
     return TRUE;
 }
 

src/report/utility-reports/hello-world.scm

@@ -448,6 +448,11 @@ new, totally cool report, consult the mailing list %s.")
            document
            (gnc:make-html-text
             (gnc:html-markup-p (_ "You have selected no accounts.")))))
+            
+      (gnc:html-document-add-object! 
+       document 
+       (gnc:make-html-text 
+        (gnc:html-markup-anchor (gnc-build-url URL-TYPE-HELP "gnucash-guide" "") (_ "Display help"))))
 
       (gnc:html-document-add-object! 
        document