From 9044ac9503bed6cc6ae3da83302ea85d799cb12a Mon Sep 17 00:00:00 2001
From: Randy Heit <rheit@users.noreply.github.com>
Date: Wed, 7 Jan 2015 22:31:48 -0600
Subject: [PATCH] Don't free non-registers.

- Fixed: ExpEmit::Free() would try to free REGT_NIL registers, which
  don't really exist
---
 src/thingdef/thingdef_expression.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/thingdef/thingdef_expression.cpp b/src/thingdef/thingdef_expression.cpp
index af6f7b52ab..1f704a1a46 100644
--- a/src/thingdef/thingdef_expression.cpp
+++ b/src/thingdef/thingdef_expression.cpp
@@ -96,7 +96,7 @@ ExpEmit::ExpEmit(VMFunctionBuilder *build, int type)
 
 void ExpEmit::Free(VMFunctionBuilder *build)
 {
-	if (!Fixed && !Konst)
+	if (!Fixed && !Konst && RegType <= REGT_TYPE)
 	{
 		build->Registers[RegType].Return(RegNum, 1);
 	}