ox-latex: Allow alt titles in starred sectionning commands

* lisp/ox-latex.el (org-latex-headline): Allow alt titles in starred
  sectionning commands.

Reported-by: Vikas Rawal <vikaslists@agrarianresearch.org>
<http://permalink.gmane.org/gmane.emacs.orgmode/97242>

lisp/ox-latex.el

@@ -1651,7 +1651,7 @@ holding contextual information."
 		    info t)))))
 	  (if (and opt-title
 		   (not (equal opt-title full-text))
-		   (string-match "\\`\\\\\\(.*?[^*]\\){" section-fmt))
+		   (string-match "\\`\\\\\\(.+?\\){" section-fmt))
 	      (format (replace-match "\\1[%s]" nil nil section-fmt 1)
 		      ;; Replace square brackets with parenthesis
 		      ;; since square brackets are not supported in