[gnome-games] chess: Only allow draw for fifty move rule

[Robert Ancell <rancell src gnome org>]

commit 8738308ab4fbc10be223ee2fc7c2bb9c680e8152
Author: Robert Ancell <robert ancell canonical com>
Date:   Tue Jan 25 15:00:06 2011 +1000

    chess: Only allow draw for fifty move rule

 glchess/src/chess-game.vala |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/glchess/src/chess-game.vala b/glchess/src/chess-game.vala
index c3c1c1f..9e286d2 100644
--- a/glchess/src/chess-game.vala
+++ b/glchess/src/chess-game.vala
@@ -1041,9 +1041,10 @@ public class ChessGame
         if (!is_started)
             return false;
 
-        // FIXME: Check if can
-
-        stop (ChessResult.DRAW, ChessRule.FIFTY_MOVES);
+        if (move_stack.data.halfmove_clock >= 50)
+            stop (ChessResult.DRAW, ChessRule.FIFTY_MOVES);
+        else
+            return false;
 
         return true;
     }