From 806e1933a2f1a80feeeb10e7923ae58461640225 Mon Sep 17 00:00:00 2001
From: jacksonmj <mj-pt@jacksonmj.co.uk>
Date: Thu, 11 Aug 2011 16:41:10 +0800
Subject: [PATCH] Fix segfault when there are no unused particles before
 parts_lastActiveIndex

---
 src/powder.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/powder.c b/src/powder.c
index 88cb71351..095a6edf4 100644
--- a/src/powder.c
+++ b/src/powder.c
@@ -2447,8 +2447,16 @@ void update_particles(pixel *vid)//doesn't update the particles themselves, but
 			lastPartUnused = i;
 		}
 	}
-	if (parts_lastActiveIndex>=NPART-1) parts[lastPartUnused].life = -1;
-	else parts[lastPartUnused].life = parts_lastActiveIndex+1;
+	if (lastPartUnused==-1)
+	{
+		if (parts_lastActiveIndex>=NPART-1) pfree = -1;
+		else pfree = parts_lastActiveIndex+1;
+	}
+	else
+	{
+		if (parts_lastActiveIndex>=NPART-1) parts[lastPartUnused].life = -1;
+		else parts[lastPartUnused].life = parts_lastActiveIndex+1;
+	}
 	parts_lastActiveIndex = lastPartUsed;
 	for (y=0; y<YRES/CELL; y++)
 	{