From a54404074a290db80cb6789f273cf8715eef94ac Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <c.oelckers@zdoom.fake>
Date: Thu, 23 Apr 2015 20:09:12 +0200
Subject: [PATCH] - fixed: IDs that map to nothing must be removed from the
 spawn/conversation ID maps.

---
 src/p_things.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/p_things.cpp b/src/p_things.cpp
index faf1091d5..50e15a1a8 100644
--- a/src/p_things.cpp
+++ b/src/p_things.cpp
@@ -659,8 +659,12 @@ void InitClassMap(FClassMap &themap, SpawnMap &thedata)
 					pair->Value.filename.GetChars(), pair->Value.linenum, pair->Value.classname.GetChars());
 				error++;
 			}
+			themap.Insert(pair->Key, cls);
+		}
+		else
+		{
+			themap.Remove(pair->Key);
 		}
-		themap.Insert(pair->Key, cls);
 	}
 	if (error > 0)
 	{