recursive edit in isearch

[Chetan Pandya <pandyacus@sbcglobal.net>]

It looks like recursive edit in isearch mode will not save/restore. Current code will try to restore the buffer if the window buffer is different from the current buffer. 
A simple change is to make sure it is so that the buffer is not restored, in case the buffer changed in the mean time.

Change 

diff -u /emacs-23/lisp/isearch.el.~1.345.~ /emacs-23/lisp/isearch.el
--- /emacs-23/lisp/isearch.el.~1.345.~    Tue Feb 17 01:27:04 2009
+++ /emacs-23/lisp/isearch.el    Thu Mar 19 01:24:24 2009
@@ -811,8 +811,7 @@
   ;; the calling function until searching is completed) by entering
   ;; a recursive-edit and exiting it when done isearching.
   (if recursive-edit
-      (let ((isearch-recursive-edit t))
-    (recursive-edit)))
+    (save-excursion (set-buffer (window-buffer)) (recursive-edit)))
   isearch-success)