From 77dcb2a600afa28bd8a197bf63ff6a0898e59436 Mon Sep 17 00:00:00 2001
From: simon <simon@cda61777-01e9-0310-a592-d414129be87e>
Date: Sun, 18 Sep 2011 07:43:18 +0000
Subject: [PATCH] When we run out of background colours for chains and wrap
 back to the beginning, we should wrap back to COL_B0+1 rather than COL_B0
 itself, so as not to reuse white. White should be special, and always
 indicate a properly numbered square.

git-svn-id: svn://svn.tartarus.org/sgt/puzzles@9305 cda61777-01e9-0310-a592-d414129be87e
---
 signpost.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/signpost.c b/signpost.c
index 6b16ff7..19649b2 100644
--- a/signpost.c
+++ b/signpost.c
@@ -1812,8 +1812,8 @@ static int num2col(game_drawstate *ds, int num)
 {
     int set = num / (ds->n+1);
 
-    if (num <= 0) return COL_B0;
-    return COL_B0 + (set % 16);
+    if (num <= 0 || set == 0) return COL_B0;
+    return COL_B0 + 1 + ((set-1) % 15);
 }
 
 #define ARROW_HALFSZ (7 * TILE_SIZE / 32)
-- 
2.11.0