From 48229837ed0c09ee57fa7bedf53d671c1e202067 Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <c.oelckers@zdoom.fake>
Date: Tue, 1 Nov 2016 13:36:33 +0100
Subject: [PATCH] - fixed: ACSStringPool::AddString did not check for NULL
 pointers as input. Let's just map them to the empty string, that's a lot
 better than crashing.

---
 src/p_acs.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/p_acs.cpp b/src/p_acs.cpp
index d82e6590c..9281bfad0 100644
--- a/src/p_acs.cpp
+++ b/src/p_acs.cpp
@@ -375,6 +375,7 @@ void ACSStringPool::Clear()
 
 int ACSStringPool::AddString(const char *str)
 {
+	if (str == nullptr) str = "";
 	size_t len = strlen(str);
 	unsigned int h = SuperFastHash(str, len);
 	unsigned int bucketnum = h % NUM_BUCKETS;