Fix subword-mode motion

* lisp/progmodes/subword.el (subword-find-word-boundary): Move point to
correct spot before search.

Fixes: debbugs:17580

lisp/ChangeLog

 2014-05-24  Daniel Colascione  <dancol@dancol.org>
 
+	* progmodes/subword.el (subword-find-word-boundary): Move point to
+	correct spot before search. (Bug#17580)
+
 	* emacs-lisp/nadvice.el (defun): Write in eval-and-compile to avoid
 	breaking the build.
 

lisp/progmodes/subword.el

@@ -355,8 +355,10 @@ searching subwords in order to avoid unwanted reentrancy.")
         (save-restriction
           (if (< pos limit)
               (progn
+                (goto-char pos)
                 (narrow-to-region (point-min) limit)
                 (funcall subword-forward-function))
+            (goto-char (1+ pos))
             (narrow-to-region limit (point-max))
             (funcall subword-backward-function))
           (point))))))