From 137ed18dc20fc217b22172072dd643ca0a7c121f Mon Sep 17 00:00:00 2001
From: Werner Almesberger <werner@almesberger.net>
Date: Thu, 31 Jan 2013 14:41:10 -0300
Subject: [PATCH] ubb-la/gui.c (show_buffer): fix calculation of the position
 offset (dp)

"pos" counts from zero so the middle point is (nibbles-skip)/2 while
the code assumed "pos" was an index into the actual buffer and the
middle point would therefore have been (nibbles+skip)/2
---
 ubb-la/gui.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ubb-la/gui.c b/ubb-la/gui.c
index 1f90294..117a30b 100644
--- a/ubb-la/gui.c
+++ b/ubb-la/gui.c
@@ -300,7 +300,7 @@ static void show_buffer(const uint8_t *buf, int skip, int nibbles,
 	int d, dp;
 
 	xm = (x0+x1) >> 1;
-	dp = pos-((nibbles+skip) >> 1);
+	dp = pos-((nibbles-skip) >> 1);
 	DEBUG("show: %d-%d Sa; %d-%d pix; pos %d dp %d; xm %d xcenter %d\n",
 	    skip, nibbles, x0, x1, pos, dp, xm, XCENTER);
 	if (zoom < 0) {