Make C-u C-x m work with Message as documented

* lisp/gnus/message.el (message-mail): Respect the CONTINUE
parameter (bug#17175).

diff --git a/lisp/gnus/message.el b/lisp/gnus/message.el
index 4d4ba0894341404a5c470618fba9ebc0716fe32c..4f9dd093fa283636ea0ecad48f055726bcc76fb7 100644 (file)
--- a/lisp/gnus/message.el
+++ b/lisp/gnus/message.el
@@ -6644,29 +6644,27 @@ OTHER-HEADERS is an alist of header/value pairs.  CONTINUE says whether
 to continue editing a message already being composed.  SWITCH-FUNCTION
 is a function used to switch to and display the mail buffer."
   (interactive)
-  (let ((message-this-is-mail t))
-    (unless (message-mail-user-agent)
-      (message-pop-to-buffer
-       ;; Search for the existing message buffer if `continue' is non-nil.
-       (let ((message-generate-new-buffers
-             (when (or (not continue)
-                       (eq message-generate-new-buffers 'standard)
-                       (functionp message-generate-new-buffers))
-               message-generate-new-buffers)))
-        (message-buffer-name "mail" to))
-       switch-function))
-    (message-setup
-     (nconc
-      `((To . ,(or to "")) (Subject . ,(or subject "")))
-      ;; C-h f compose-mail says that headers should be specified as
-      ;; (string . value); however all the rest of message expects
-      ;; headers to be symbols, not strings (eg message-header-format-alist).
-      ;; http://lists.gnu.org/archive/html/emacs-devel/2011-01/msg00337.html
-      ;; We need to convert any string input, eg from rmail-start-mail.
-      (dolist (h other-headers other-headers)
-       (if (stringp (car h)) (setcar h (intern (capitalize (car h)))))))
-     yank-action send-actions continue switch-function
-     return-action)))
+  (let ((message-this-is-mail t)
+       message-buffers)
+    ;; Search for the existing message buffer if `continue' is non-nil.
+    (if (and continue
+            (setq message-buffers (message-buffers)))
+       (pop-to-buffer (car message-buffers))
+      ;; Start a new buffer.
+      (unless (message-mail-user-agent)
+       (message-pop-to-buffer (message-buffer-name "mail" to) switch-function))
+      (message-setup
+       (nconc
+       `((To . ,(or to "")) (Subject . ,(or subject "")))
+       ;; C-h f compose-mail says that headers should be specified as
+       ;; (string . value); however all the rest of message expects
+       ;; headers to be symbols, not strings (eg message-header-format-alist).
+       ;; http://lists.gnu.org/archive/html/emacs-devel/2011-01/msg00337.html
+       ;; We need to convert any string input, eg from rmail-start-mail.
+       (dolist (h other-headers other-headers)
+         (if (stringp (car h)) (setcar h (intern (capitalize (car h)))))))
+       yank-action send-actions continue switch-function
+       return-action))))
 
 ;;;###autoload
 (defun message-news (&optional newsgroups subject)