[gnome-chess] Set game_needs_saving = false after a normal Save

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 1b7143072eff592a4d6c38f1aef83b1b10571726
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sun Dec 6 11:44:35 2020 -0600

    Set game_needs_saving = false after a normal Save
    
    This currently only happens after Save As. Oops?

 src/gnome-chess.vala | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/gnome-chess.vala b/src/gnome-chess.vala
index f8cbc11..c11800d 100644
--- a/src/gnome-chess.vala
+++ b/src/gnome-chess.vala
@@ -2428,6 +2428,7 @@ Copyright © 2015–2016 Sahil Sareen""";
         try
         {
             pgn_game.write (game_file);
+            game_needs_saving = false;
             disable_window_action (SAVE_GAME_ACTION_NAME);
         }
         catch (Error e)