lisp/emacs-lisp/tabulated-list.el: Fix alignment problem with :pad-right = 0.

(tabulated-list-init-header): Don't skip aligning the next header field when
padding is 0; otherwise, field width is not respected unless the title is as
wide as the field.

lisp/ChangeLog

+2013-06-23  Juanma Barranquero  <lekktu@gmail.com>
+
+	* emacs-lisp/tabulated-list.el (tabulated-list-init-header):
+	Don't skip aligning the next header field when padding is 0;
+	otherwise, field width is not respected unless the title is as
+	wide as the field.
+
 2013-06-22  Stefan Monnier  <monnier@iro.umontreal.ca>
 
 	* emacs-lisp/package.el (package-el-version): Remove.

lisp/emacs-lisp/tabulated-list.el

@@ -230,7 +230,7 @@ If ADVANCE is non-nil, move forward by one line afterwards."
                                             `(space :align-to ,(+ x shift)))
                                 (cdr cols))))
               (setq x (+ x shift)))))
-	(if (> pad-right 0)
+	(if (>= pad-right 0)
 	    (push (propertize " "
 			      'display `(space :align-to ,next-x)
 			      'face 'fixed-pitch)