* lisp/doc-view.el (doc-view-epub-font-size): Fix type; add version.

Flagged by test-custom-opts.

diff --git a/lisp/doc-view.el b/lisp/doc-view.el
index ee6aa055172fbd6c14054a26dd55ba95c7cc879c..b222096ac684c1ead990a7e04839428139a47d72 100644 (file)
--- a/lisp/doc-view.el
+++ b/lisp/doc-view.el
@@ -254,8 +254,9 @@ Can be `dvi', `pdf', `ps', `djvu', `odf', 'epub', `cbz', `fb2',
 
 (defcustom doc-view-epub-font-size nil
   "Font size in points for EPUB layout."
-  :type 'integer
-  :set #'doc-view-custom-set-epub-font-size)
+  :type '(choice (const nil) integer)
+  :set #'doc-view-custom-set-epub-font-size
+  :version "29.1")
 
 (defcustom doc-view-scale-internally t
   "Whether we should try to rescale images ourselves.