From d1ce098d59645283231ca2304dbc857708117f08 Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@users.noreply.github.com>
Date: Wed, 11 Jan 2017 10:46:26 +0100
Subject: [PATCH] - fixed a crash with GL nodes not having partner segs where
 both sides have a sidedef. This can happen for some render hacks.

---
 src/p_glnodes.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/p_glnodes.cpp b/src/p_glnodes.cpp
index 35f9f4502..0860c98b8 100644
--- a/src/p_glnodes.cpp
+++ b/src/p_glnodes.cpp
@@ -1488,7 +1488,7 @@ void P_SetRenderSector()
 		seg = ss->firstline;
 		for(j=0; j<ss->numlines; j++)
 		{
-			if(seg->sidedef && (seg->PartnerSeg == nullptr || seg->sidedef->sector!=seg->PartnerSeg->sidedef->sector))
+			if(seg->sidedef && (seg->PartnerSeg == nullptr || (seg->PartnerSeg->sidedef != nullptr && seg->sidedef->sector!=seg->PartnerSeg->sidedef->sector)))
 			{
 				ss->render_sector = seg->sidedef->sector;
 				break;