emacs: fix disabling of scroll-bar-mode, again

.emacs.d/init.org

@@ -58,7 +58,7 @@ Configure some startup parameters.
   (tool-bar-mode 0) ;; disable the tool bar
   (setq alert-bell-function "ignore")
   (if (window-system)
-      (scroll-bar-mode nil)) ;; disable scroll bars
+      (scroll-bar-mode -1)) ;; disable scroll bars
 #+END_SRC
 
 *** Deleting