tmp buf fix (Re: Undumpable object type : buffer, extent)

> I take it that it's some kind of internal garbage problem and not
> an issue with my use of temporary buffers.

It is.  The patch restores cc-mode portable dumpability.

Stephen J. Turnbull wrote in
<[email protected]>:

> I would guess that what happens with unexec is that these structures
> are unexec'd into the executable file, constituting a memory leak that
> occurs before execution :-).

No leak in XEmacs was found.  However, the bug being fixed below may
occur in other packages.  Perhaps an item should be added to
"(lispref)Style Tips" to avoid this.

	* cc-vars.el (c-emacs-features): Call `buffer-disable-undo' on
	temporary buffer, so that it does not stay referenced by internal
	undo variable(s) after getting killed, gagging portable dumper.

--- cc-vars.el	3 Oct 2003 17:26:12 -0000	1.1
+++ cc-vars.el	16 Oct 2003 17:51:29 -0000	1.2
@@ -1579,6 +1579,7 @@
 	  parse-sexp-lookup-properties
 	  parse-sexp-ignore-comments
 	  lookup-syntax-properties)
+      (buffer-disable-undo buf)
       (save-excursion
 	(set-buffer buf)
 	(set-syntax-table (make-syntax-table))