From c30d5d42a299209454b5dca7ba5f2b36286e6950 Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <c.oelckers@zdoom.fake>
Date: Mon, 18 Apr 2016 12:56:16 +0200
Subject: [PATCH] - fixed: UpdateSectorRenderList may not be called when
 spawning mapthings.

At this time the portals have not been initialized yet and doing this here would trash the cached previous coordinate.
---
 src/p_maputl.cpp | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/p_maputl.cpp b/src/p_maputl.cpp
index f3dda49a9..8ee251316 100644
--- a/src/p_maputl.cpp
+++ b/src/p_maputl.cpp
@@ -396,14 +396,19 @@ bool AActor::FixMapthingPos()
 
 void AActor::LinkToWorld(bool spawningmapthing, sector_t *sector)
 {
-	if (spawningmapthing && (flags4 & MF4_FIXMAPTHINGPOS) && sector == NULL)
+	bool spawning = spawningmapthing;
+
+	if (spawning)
 	{
-		if (FixMapthingPos()) spawningmapthing = false;
+		if ((flags4 & MF4_FIXMAPTHINGPOS) && sector == NULL)
+		{
+			if (FixMapthingPos()) spawning = false;
+		}
 	}
 
 	if (sector == NULL)
 	{
-		if (!spawningmapthing || numgamenodes == 0)
+		if (!spawning || numgamenodes == 0)
 		{
 			sector = P_PointInSector(Pos());
 		}
@@ -499,7 +504,8 @@ void AActor::LinkToWorld(bool spawningmapthing, sector_t *sector)
 			}
 		}
 	}
-	UpdateRenderSectorList();
+	// Portal links cannot be done unless the level is fully initialized.
+	if (!spawningmapthing) UpdateRenderSectorList();
 }
 
 void AActor::SetOrigin(double x, double y, double z, bool moving)