(rmail-nonignored-headers): Allow to be nil.

(rmail-clear-headers): Don't check `rmail-nonignored-headers' when
it is nil.

2 files changed, 10 insertions, 2 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 3157aeef6e6..0e664149b94 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,9 @@
+2008-02-10  Bastien Guerry  <bzg@altern.org>
+
+        * mail/rmail.el (rmail-nonignored-headers): Allow to be nil.
+        (rmail-clear-headers): Don't check `rmail-nonignored-headers' when
+        it is nil.
+
 2008-02-10  Daiki Ueno  <ueno@unixuser.org>
 
         * epg-config.el: Expand the contents of epg-package-info.el.
diff --git a/lisp/mail/rmail.el b/lisp/mail/rmail.el
index 7ea89ab84bf..ed434ad75cb 100644
--- a/lisp/mail/rmail.el
+++ b/lisp/mail/rmail.el
@@ -299,6 +299,7 @@ go to that message and type \\[rmail-toggle-header] twice."
   "*Regexp to match X header fields that Rmail should show.
 This regexp overrides `rmail-ignored-headers'; if both this regexp
 and that one match a certain header field, Rmail shows the field.
+If this is nil, ignore all header fields in `rmail-ignored-headers'.
 
 This variable is used for reformatting the message header,
 which normally happens once for each message,
@@ -306,7 +307,7 @@ when you view the message for the first time in Rmail.
 To make a change in this variable take effect
 for a message that you have already viewed,
 go to that message and type \\[rmail-toggle-header] twice."
-  :type 'regexp
+  :type '(choice (const nil) (regexp))
   :group 'rmail-headers)
 
 ;;;###autoload
@@ -2329,7 +2330,8 @@ unless they also match `rmail-nonignored-headers'."
           (while (and ignored-headers
                       (re-search-forward ignored-headers nil t))
             (beginning-of-line)
-            (if (looking-at rmail-nonignored-headers)
+            (if (and rmail-nonignored-headers
+                     (looking-at rmail-nonignored-headers))
                 (forward-line 1)
               (delete-region (point)
                              (save-excursion