From e8e940d22137ec03293ee04b7f18852380d084ba Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@users.noreply.github.com>
Date: Thu, 20 Jul 2017 18:32:54 +0200
Subject: [PATCH] - fixed portal handling for P_CheckMissileSpawn to obey
 commonly established rules about portal types.

---
 src/p_mobj.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/p_mobj.cpp b/src/p_mobj.cpp
index 3f82c7190..e2646ade8 100644
--- a/src/p_mobj.cpp
+++ b/src/p_mobj.cpp
@@ -6718,7 +6718,7 @@ bool P_CheckMissileSpawn (AActor* th, double maxdist)
 			th->tics = 1;
 	}
 
-	DVector3 newpos = th->Pos();
+	DVector3 newpos = { 0,0,0 };
 
 	if (maxdist > 0)
 	{
@@ -6736,6 +6736,9 @@ bool P_CheckMissileSpawn (AActor* th, double maxdist)
 		newpos += advance;
 	}
 
+	newpos = th->Vec3Offset(newpos);
+	th->SetXYZ(newpos);
+
 	FCheckPosition tm(!!(th->flags2 & MF2_RIP));
 
 	// killough 8/12/98: for non-missile objects (e.g. grenades)