From d7053422f14d60daca97a3c3c321ae82fd82025a Mon Sep 17 00:00:00 2001
From: Simon Robertshaw <simon@hardwired.org.uk>
Date: Tue, 12 Jul 2011 06:54:47 -0700
Subject: [PATCH] fix potential crashes with LIFE - jacksonmj

---
 src/powder.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/powder.c b/src/powder.c
index 2a72fee64..853914d62 100644
--- a/src/powder.c
+++ b/src/powder.c
@@ -831,7 +831,7 @@ inline int create_part(int p, int x, int y, int tv)//the function for creating a
 			if (t==goltype[r])
 				parts[i].tmp = grule[r+1][9] - 1;
 	}*/
-	if (t==PT_LIFE)
+	if (t==PT_LIFE && v<NGOLALT)
 	{
 		parts[i].tmp = grule[v+1][9] - 1;
 		parts[i].ctype = v;
@@ -1486,6 +1486,10 @@ void update_particles_i(pixel *vid, int start, int inc)
 						if (parts[r>>8].type==PT_LIFE/* && parts[r>>8].ctype==golnum-1*/)
 						{
 							golnum = parts[r>>8].ctype+1;
+							if (golnum<=0 || golnum>NGOLALT) {
+								parts[r>>8].type = PT_NONE;
+								continue;
+							}
 							if (parts[r>>8].tmp == grule[golnum][9]-1) {
 								gol[nx][ny] = golnum;
 								for ( nnx=-1; nnx<2; nnx++)