From 84a32e9cee2a70c0ec6ef58c1be279fed84a9a53 Mon Sep 17 00:00:00 2001
From: Gunnar Farnebäck <gunnar@lysator.liu.se>
Date: Thu, 13 Jun 2013 18:45:03 +0000
Subject: Avoid crashing due to registering an invalid loss move reason.

---
diff --git a/engine/value_moves.c b/engine/value_moves.c
index e9f2daa..7ec8fdd 100644
--- a/engine/value_moves.c
+++ b/engine/value_moves.c
@@ -383,7 +383,7 @@ do_find_more_owl_attack_and_defense_moves(int color, int pos,
       int dcode = owl_does_defend(pos, dd, &kworm);
 
       if (dcode >= DRAGON2(dd).owl_defense_code) {
-	if (dcode == LOSS)
+	if (dcode == LOSS && kworm != NO_MOVE)
 	  add_loss_move(pos, dd, kworm);
 	else
 	  add_owl_defense_move(pos, dd, dcode);
--
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