Fix invalid defcustom type for erc-buffers option

* lisp/erc/erc.el (erc-ensure-target-buffer-on-privmsg): Change
invalid inner `choice' to a `const' for the third-state `status'
variant, which is new in ERC 5.6 and Emacs 30.  Thanks to Mattias
Engdegård for catching this.

(cherry picked from commit d77f8a347500da4c1ce7553332a481c5507412fc)

diff --git a/lisp/erc/erc.el b/lisp/erc/erc.el
index a94a4366cfabbdc970fc7b2dfaa2614157d597e1..0ac58b09f64508a98bc637093bff17fd7257dd29 100644 (file)
--- a/lisp/erc/erc.el
+++ b/lisp/erc/erc.el
@@ -6032,8 +6032,7 @@ manner implied above, which was lost sometime before ERC 5.4."
   :group 'erc-buffers
   :group 'erc-query
   :type '(choice boolean
-                 (choice :tag "Create pseudo queries for STATUSMSGs"
-                         status)))
+                 (const :tag "Create pseudo queries for STATUSMSGs" status)))
 
 (defcustom erc-format-query-as-channel-p t
   "If non-nil, format text from others in a query buffer like in a channel.