(rmail-summary-window-size): Allow integer values.

diff --git a/lisp/mail/rmail.el b/lisp/mail/rmail.el
index 58bb678a5ac6a6a432703c7257d8d4026accd95a..06bfa89e733df94b70f6be11c07825645f699e4e 100644 (file)
--- a/lisp/mail/rmail.el
+++ b/lisp/mail/rmail.el
@@ -2871,7 +2871,7 @@ This has an effect only if a summary buffer exists."
 
 (defcustom rmail-summary-window-size nil
   "*Non-nil means specify the height for an Rmail summary window."
-  :type 'boolean
+  :type '(choice (const :tag "Disabled" nil) integer)
   :group 'rmail-summary)
 
 ;; Put the summary buffer back on the screen, if user wants that.