org-element: Fix cache

* lisp/org-element.el (org-element--cache-after-change): Preserve
  match data.

Thanks to Matt Lundin for reporting it.
http://permalink.gmane.org/gmane.emacs.orgmode/87871

lisp/org-element.el

@@ -5449,15 +5449,14 @@ text.  See `before-change-functions' for more information."
 BEG and END are the beginning and end of the range of changed
 text, and the length in bytes of the pre-change text replaced by
 that range.  See `after-change-functions' for more information."
-  (let ((inhibit-quit t))
   (when (org-element--cache-active-p)
     (org-with-wide-buffer
      (goto-char beg)
      (beginning-of-line)
+     (save-match-data
        (let ((top (point))
 	     (bottom (save-excursion (goto-char end) (line-end-position))))
 	 (org-with-limited-levels
-	  (save-match-data
 	  ;; Determine if modified area needs to be extended,
 	  ;; according to both previous and current state.  We make
 	  ;; a special case for headline editing: if a headline is
@@ -5484,12 +5483,12 @@ that range.  See `after-change-functions' for more information."
 			     (point)))
 	    (setq bottom (progn (goto-char bottom)
 				(if (outline-next-heading) (1- (point))
-				    (point)))))))
+				  (point))))))
 	 ;; Store synchronization request.
 	 (let ((offset (- end beg pre)))
-	   (org-element--cache-submit-request top (- bottom offset) offset))))
+	   (org-element--cache-submit-request top (- bottom offset) offset)))))
     ;; Activate a timer to process the request during idle time.
-      (org-element--cache-set-timer (current-buffer)))))
+    (org-element--cache-set-timer (current-buffer))))
 
 (defun org-element--cache-for-removal (beg end offset)
   "Return first element to remove from cache.