LaTeX export: Protect examples, even if they look like table.el tables

The recent patch to introduce table.el export in LaTeX forgot to check
protectedness.

lisp/ChangeLog

@@ -2,6 +2,8 @@
 
 	* org-latex.el (org-export-latex-special-chars): Find subsequent
 	occurrences of special characters.
+	(org-export-latex-tables): Do not convert table-like stuff that is
+	protected.
 
 2010-03-01  Carsten Dominik  <carsten.dominik@gmail.com>
 

lisp/org-latex.el

@@ -1541,8 +1541,9 @@ The conversion is made depending of STRING-BEFORE and STRING-AFTER."
   ;; First, get the table.el tables
   (goto-char (point-min))
   (while (re-search-forward "^[ \t]*\\(\\+-[-+]*\\+\\)[ \t]*\n[ \t]*|" nil t)
-    (require 'table)
-    (org-export-latex-convert-table.el-table))
+    (org-if-unprotected
+     (require 'table)
+     (org-export-latex-convert-table.el-table)))
 
   ;; And now the Org-mode tables
   (goto-char (point-min))