dns-mode-soa-auto-increment-serial: safe if symbolp

* lisp/textmodes/dns-mode.el (dns-mode-soa-auto-increment-serial):
Mark variable as safe as a file local variable when symbolp.

diff --git a/lisp/textmodes/dns-mode.el b/lisp/textmodes/dns-mode.el
index 3bdea946105949bf2caa34d8bd177fb777d355c2..6dfea8f188779a722912d4ee032817f8e4e51397 100644 (file)
--- a/lisp/textmodes/dns-mode.el
+++ b/lisp/textmodes/dns-mode.el
@@ -134,6 +134,7 @@ manually with \\[dns-mode-soa-increment-serial]."
   :type '(choice (const :tag "Always" t)
                 (const :tag "Ask" ask)
                 (const :tag "Never" nil))
+  :safe 'symbolp
   :group 'dns-mode)
 
 ;; Syntax table.