[elpa] externals/vundo c5e0f94da0: * vundo.el (vundo): Check for read-only.

[ELPA Syncer]

branch: externals/vundo
commit c5e0f94da05fc76f5683a1d6fda231a8ec215869
Author: Yuan Fu <casouri@gmail.com>
Commit: Yuan Fu <casouri@gmail.com>

    * vundo.el (vundo): Check for read-only.
---
 vundo.el | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/vundo.el b/vundo.el
index d293cec195..a4e874d532 100644
--- a/vundo.el
+++ b/vundo.el
@@ -745,6 +745,8 @@ This function modifies ‘vundo--prev-mod-list’,
   (interactive)
   (when (not (consp buffer-undo-list))
     (user-error "There is no undo history"))
+  (when buffer-read-only
+    (user-error "Buffer is read-only"))
   (run-hooks 'vundo-pre-enter-hook)
   (let ((vundo-buf (vundo-1 (current-buffer))))
     (select-window