Fix bug with radio targets.

The variable containing the regexp for radio target matches was not
buffer-local, causing all sorts of problems.

lisp/ChangeLog

@@ -1,3 +1,7 @@
+2008-12-05  Carsten Dominik  <carsten.dominik@gmail.com>
+
+	* org.el (org-target-link-regexp): Make buffer-local.
+
 2008-12-04  Carsten Dominik  <carsten.dominik@gmail.com>
 
 	* org-faces.el (org-set-tag-faces): New function.

lisp/org.el

@@ -3721,6 +3721,7 @@ will be prompted for."
 
 (defvar org-target-link-regexp nil
   "Regular expression matching radio targets in plain text.")
+(make-variable-buffer-local 'org-target-link-regexp)
 (defvar org-target-regexp "<<\\([^<>\n\r]+\\)>>"
   "Regular expression matching a link target.")
 (defvar org-radio-target-regexp "<<<\\([^<>\n\r]+\\)>>>"