From 5ca7c1b0f88ec3f48a83dc641f864d6ee4979ae2 Mon Sep 17 00:00:00 2001
From: Janne Karhu <jhkarh@gmail.com>
Date: Thu, 2 Dec 2010 14:52:07 +0000
Subject: Fix for [#25006] Particle system crash (missing check for negative
 index)

---
 source/blender/blenkernel/intern/particle_system.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'source')

diff --git a/source/blender/blenkernel/intern/particle_system.c b/source/blender/blenkernel/intern/particle_system.c
index 63f2d692c6d..f4af518d137 100644
--- a/source/blender/blenkernel/intern/particle_system.c
+++ b/source/blender/blenkernel/intern/particle_system.c
@@ -340,6 +340,11 @@ void psys_calc_dmcache(Object *ob, DerivedMesh *dm, ParticleSystem *psys)
 		
 		/* cache the verts/faces! */
 		LOOP_PARTICLES {
+			if(pa->num < 0) {
+				pa->num_dmcache = -1;
+				continue;
+			}
+
 			if(psys->part->from == PART_FROM_VERT) {
 				if(nodearray[pa->num])
 					pa->num_dmcache= GET_INT_FROM_POINTER(nodearray[pa->num]->link);
-- 
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