[pan2] Update copyright year

[Petr Kovář <pmkovar src gnome org>]

commit b54577d60dc10115683babca3494940c3e116eee
Author: Petr Kovar <pknbe volny cz>
Date:   Wed Dec 23 21:01:12 2015 +0100

    Update copyright year

 pan/gui/gui.cc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/pan/gui/gui.cc b/pan/gui/gui.cc
index ef415e7..d709608 100644
--- a/pan/gui/gui.cc
+++ b/pan/gui/gui.cc
@@ -1667,7 +1667,7 @@ void GUI :: do_about_pan ()
   gtk_about_dialog_set_program_name (w, _("Pan"));
   gtk_about_dialog_set_version (w, PACKAGE_VERSION);
   gtk_about_dialog_set_comments (w, VERSION_TITLE " (" GIT_REV "; " PLATFORM_INFO ")");
-  gtk_about_dialog_set_copyright (w, _("Copyright \u00A9 2002-2012 Charles Kerr and others")); // \u00A9 is 
unicode for (c)
+  gtk_about_dialog_set_copyright (w, _("Copyright \u00A9 2002-2015 Charles Kerr and others")); // \u00A9 is 
unicode for (c)
   gtk_about_dialog_set_website (w, "http://pan.rebelbase.com/";);
   gtk_about_dialog_set_logo (w, logo);
   gtk_about_dialog_set_license (w, LICENSE);