From: H.G.Muller <hgm@hgm-xboard.(none)>
Date: Tue, 29 Mar 2016 14:30:50 +0000 (+0200)
Subject: Fix erasing of premove highlights XB
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=95244a1c40718e9ad8bda9e2df66677e180354d6;p=xboard.git

Fix erasing of premove highlights XB

The to-square premove highlight was not marked for erasure (but
the from-square was marked twice if the to-square higlight  changed),
leading to accumulation of highlighted squares during PV walking.
---

diff --git a/board.c b/board.c
index 30cea29..f691696 100644
--- a/board.c
+++ b/board.c
@@ -194,7 +194,7 @@ SetPremoveHighlights (int fromX, int fromY, int toX, int toY)
     }
     if (pm2X != toX || pm2Y != toY) {
 	if (pm2X >= 0 && pm2Y >= 0) {
-	    damage[0][pm1Y][pm1X] |= 2;
+	    damage[0][pm2Y][pm2X] |= 2;
 	}
     }
     pm1X = fromX;