Fix display-fill-column-indicator custom spec typo

* lisp/cus-start.el (standard): Fix typo in
display-fill-column-indicator custom spec.

Debugger entered--Lisp error: (wrong-type-argument stringp integer)
  string-match("\\([0-9]+\\)\\(\\.\\([0-9]+\\)\\)?" integer)
  customize-version-lessp("25.3" integer)
 [...]
  customize-changed-options("")

1 files changed, 3 insertions, 2 deletions

diff --git a/lisp/cus-start.el b/lisp/cus-start.el
index 4c4d5ebb16d..e1d0bce2ad0 100644
--- a/lisp/cus-start.el
+++ b/lisp/cus-start.el
@@ -657,8 +657,9 @@ since it could result in memory overflow and make Emacs crash."
                                          :value t)
                                   (const :tag "Fixed column number"
                                          :value 70
-                                         :format "%v"))
-                                 integer "27.1")
+                                         :format "%v")
+                                  integer)
+                                 "27.1")
              (display-fill-column-indicator-character display-fill-column-indicator
                                  character "27.1")
              ;; xfaces.c