From cf6a7595cdfb30094286c4c4f48d08a8cc2cdb5b Mon Sep 17 00:00:00 2001
From: Fabian Greffrath <fabian@greffrath.com>
Date: Thu, 16 Jan 2020 11:31:30 +0100
Subject: [PATCH] fix possible NULL-pointer dereference in deh_procStringSub()

---
 Source/d_deh.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Source/d_deh.c b/Source/d_deh.c
index da7b971a..d15c78e2 100644
--- a/Source/d_deh.c
+++ b/Source/d_deh.c
@@ -2575,7 +2575,7 @@ boolean deh_procStringSub(char *key, char *lookfor, char *newstring, FILE *fpout
           if (!key)
             if (fpout) fprintf(fpout,
                                "Assigned '%.12s%s' to'%.12s%s' at key %s\n",
-                               lookfor, (strlen(lookfor) > 12) ? "..." : "",
+                               lookfor ? : "", (lookfor && strlen(lookfor) > 12) ? "..." : "",
                                newstring, (strlen(newstring) > 12) ? "..." :"",
                                deh_strlookup[i].lookup);