[gnome-klotski] Print --version output to stdout.

[Arnaud Bonatti <arnaudb src gnome org>]

commit 68f2b37db1fa9328a07e80b418ec750956350ca5
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Sun Oct 11 04:32:04 2015 +0200

    Print --version output to stdout.

 src/gnome-klotski.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gnome-klotski.vala b/src/gnome-klotski.vala
index f1adff7..fee3392 100644
--- a/src/gnome-klotski.vala
+++ b/src/gnome-klotski.vala
@@ -478,7 +478,7 @@ public class Klotski : Gtk.Application
         if (options.contains ("version"))
         {
             /* NOTE: Is not translated so can be easily parsed */
-            stderr.printf ("%1$s %2$s\n", "gnome-klotski", VERSION);
+            stdout.printf ("%1$s %2$s\n", "gnome-klotski", VERSION);
             return Posix.EXIT_SUCCESS;
         }