Use save-match-data in lyskom-remove-buffer-from-lists.

Protect match-data from being changed when called from
kill-buffer-hook.

This function caused evaluation of python code from org-mode to
fail. Reported by Pär Kurlberg in text 2023386.

src/ChangeLog

+2014-06-26  Christer Ekholm  <che@chrekh.se>
+
+	* buffers.el (lyskom-remove-buffer-from-lists): Use
+	save-match-data around code that does regexp matching, since this
+	get's called from kill-buffer-hook.
+
+	This function caused evaluation of python code from org-mode to
+	fail. Reported by Pär Kurlberg in text 2023386.
+
 2014-06-22  Christer Ekholm  <che@chrekh.se>
 
 	* compatibility.el: Added compatibility-macro for read-only-mode.

src/buffers.el

@@ -223,11 +223,12 @@ the children object"
     "Remove BUFFER from all internal lists.
 If BUFFER is not specified, assume the current buffer"
   (unless buffer (setq buffer (current-buffer)))
-  (lyskom-remove-unread-buffer buffer)  
-  (setq lyskom-buffer-list
-        (delq buffer lyskom-buffer-list))
-  (lyskom-update-unread-mode-line)
-  (lyskom-set-default 'lyskom-need-prompt-update t))
+  (save-match-data
+    (lyskom-remove-unread-buffer buffer)  
+    (setq lyskom-buffer-list
+	  (delq buffer lyskom-buffer-list))
+    (lyskom-update-unread-mode-line)
+    (lyskom-set-default 'lyskom-need-prompt-update t)))
 
 (defun lyskom-remove-unread-buffer (buffer &optional letters-only)
   (unless letters-only