[gparted] Update copyright year

[Curtis Gedak <gedakc src gnome org>]

commit 3f3209c6bad2ed4abb6a42c8561eaead7bd7a12e
Author: Curtis Gedak <gedakc gmail com>
Date:   Mon Mar 19 10:05:34 2018 -0600

    Update copyright year

 AUTHORS            |    4 ++--
 src/Win_GParted.cc |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/AUTHORS b/AUTHORS
index 665473e..aaee83a 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -1,9 +1,9 @@
 This file is part of GParted
 Copyright (C) 2004, 2005, 2006
        Bart Hakvoort
-Portions Copyright (C) 2008-2017
+Portions Copyright (C) 2008-2018
        Curtis Gedak
-Portions Copyright (C) 2011-2017
+Portions Copyright (C) 2011-2018
        Mike Fleetwood
 
 This file may be modified and/or distributed without restriction.  This is
diff --git a/src/Win_GParted.cc b/src/Win_GParted.cc
index f1739fe..edb81a3 100644
--- a/src/Win_GParted.cc
+++ b/src/Win_GParted.cc
@@ -1679,8 +1679,8 @@ void Win_GParted::menu_help_about()
        dialog .set_comments( _( "GNOME Partition Editor" ) ) ;
        std::string names ;
        names =    "Copyright © 2004-2006 Bart Hakvoort" ;
-       names += "\nCopyright © 2008-2017 Curtis Gedak" ;
-       names += "\nCopyright © 2011-2017 Mike Fleetwood" ;
+       names += "\nCopyright © 2008-2018 Curtis Gedak" ;
+       names += "\nCopyright © 2011-2018 Mike Fleetwood" ;
        dialog .set_copyright( names ) ;
 
        //authors