[goobox] Fixed a typo in the license text.

[Paolo Bacchilega <paobac src gnome org>]

commit 2d50a47a34a3114b1575236a2916752bb02f54e8
Author: Tadej Janež <tadej janez tadej hicsalta si>
Date:   Mon Apr 7 16:44:34 2014 +0200

    Fixed a typo in the license text.

 src/main.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/main.c b/src/main.c
index 3040dce..ff8d715 100644
--- a/src/main.c
+++ b/src/main.c
@@ -8,7 +8,7 @@
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either arg_version 2 of the License, or
- *  (at your option) any later arg_version.
+ *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of