[ghex] Update copyright year in the about dialog

[Piotr Drąg <piotrdrag src gnome org>]

commit 3a9195d5961cfac04d7acc741557ef310fb6c512
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Wed Mar 21 20:30:59 2018 +0100

    Update copyright year in the about dialog
    
    https://bugzilla.gnome.org/show_bug.cgi?id=794576

 src/ui.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/ui.c b/src/ui.c
index 0be8dda..a9f7e00 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -176,8 +176,8 @@ about_cb (GtkAction  *action,
                                        NULL);
 
        /* Translators: these two strings here indicate the copyright time span,
-          e.g. 1998-2012. */
-       copyright = g_strdup_printf (_("Copyright © %Id–%Id The GHex authors"), 1998, 2012);
+          e.g. 1998-2018. */
+       copyright = g_strdup_printf (_("Copyright © %Id–%Id The GHex authors"), 1998, 2018);
 
        gtk_show_about_dialog (GTK_WINDOW (window),
                               "authors", authors,