Fix selective diff browsing in Ediff

[gnu-emacs] / lisp / erc / erc-backend.el

diff --git a/lisp/erc/erc-backend.el b/lisp/erc/erc-backend.el
index fb22f58822d041d6f04e23dac191db69fd3be15e..8ce199fbcbb02a57762073333f3e85caca66073f 100644 (file)
--- a/lisp/erc/erc-backend.el
+++ b/lisp/erc/erc-backend.el
@@ -1,6 +1,6 @@
 ;;; erc-backend.el --- Backend network communication for ERC
 
-;; Copyright (C) 2004-2014 Free Software Foundation, Inc.
+;; Copyright (C) 2004-2015 Free Software Foundation, Inc.
 
 ;; Filename: erc-backend.el
 ;; Author: Lawrence Mitchell <wence@gmx.li>
@@ -1162,8 +1162,11 @@ add things to `%s' instead."
           (cl-loop for alias in aliases
                    collect (intern (format "erc-server-%s-functions" alias)))))
     `(prog2
-         ;; Normal hook variable.
-         (defvar ,hook-name ',fn-name ,(format hook-doc name))
+         ;; Normal hook variable.  The variable may already have a
+         ;; value at this point, so I default to nil, and (add-hook)
+         ;; unconditionally
+         (defvar ,hook-name nil ,(format hook-doc name))
+         (add-to-list ',hook-name ',fn-name)
          ;; Handler function
          (defun ,fn-name (proc parsed)
            ,fn-doc