Update copyright dates (20XY-2012 ==> 20XY-2013)


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13658 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/coregrind/m_hashtable.c b/coregrind/m_hashtable.c
index abf1df0..d71e759 100644
--- a/coregrind/m_hashtable.c
+++ b/coregrind/m_hashtable.c
@@ -7,7 +7,7 @@
    This file is part of Valgrind, a dynamic binary instrumentation
    framework.
 
-   Copyright (C) 2005-2012 Nicholas Nethercote
+   Copyright (C) 2005-2013 Nicholas Nethercote
       njn@valgrind.org
 
    This program is free software; you can redistribute it and/or