From 6b8acd5d5bde57ac81d453f46aada6a6cf0dc9e0 Mon Sep 17 00:00:00 2001
From: Wilbert Pol <wilbert@jdg.info>
Date: Mon, 28 Jul 2014 08:34:04 +0000
Subject: [PATCH] gb_lcd.c: Fix another index out of bound access in the
 supergb driver (nw)

---
 src/mess/video/gb_lcd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/mess/video/gb_lcd.c b/src/mess/video/gb_lcd.c
index 53d68296779..17e47fcf891 100644
--- a/src/mess/video/gb_lcd.c
+++ b/src/mess/video/gb_lcd.c
@@ -793,7 +793,8 @@ void sgb_lcd_device::update_sprites()
 			data = (vram[adr + 1] << 8) | vram[adr];
 
 			/* Find the palette to use */
-			pal = m_sgb_pal_map[(xindex >> 3)][((yindex - SGB_YOFFSET) >> 3)] << 2;
+			// If sprite started before the start of the line we may need to pick a different pal_map entry?
+			pal = m_sgb_pal_map[(xindex < 0) ? 0 : (xindex >> 3)][((yindex - SGB_YOFFSET) >> 3)] << 2;
 
 			/* Offset to center of screen */
 			xindex += SGB_XOFFSET;