[gnome-chess/gnome-3-8] Fix detection of draws by the fifty-move rule

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 7f17d8af307dd3b1b2c6e97a26b304912e52494e
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sun Aug 11 16:51:18 2013 -0500

    Fix detection of draws by the fifty-move rule
    
    The halfmove clock was reset to zero each time we copied a ChessState
    object.

 src/chess-game.vala |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/chess-game.vala b/src/chess-game.vala
index 2b4c0a6..8a2451e 100644
--- a/src/chess-game.vala
+++ b/src/chess-game.vala
@@ -408,6 +408,7 @@ public class ChessState
             state.board[i] = board[i];
         state.piece_masks[Color.WHITE] = piece_masks[Color.WHITE];
         state.piece_masks[Color.BLACK] = piece_masks[Color.BLACK];
+        state.halfmove_clock = halfmove_clock;
 
         return state;
     }