From 1d5c1de5d341f8cdfafa89d7f468570a80ed930f Mon Sep 17 00:00:00 2001
From: ehofman <ehofman>
Date: Mon, 4 Aug 2003 17:05:12 +0000
Subject: [PATCH] Add a safety precausion

---
 simgear/screen/extensions.cxx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/simgear/screen/extensions.cxx b/simgear/screen/extensions.cxx
index 99a17086..c16509f6 100644
--- a/simgear/screen/extensions.cxx
+++ b/simgear/screen/extensions.cxx
@@ -33,6 +33,9 @@ bool SGSearchExtensionsString(char *extString, char *extName) {
     char *p, *end;
     int n, extNameLen;
 
+    if ((extString == NULL) || (extName == NULL))
+        return false;
+
     extNameLen = strlen(extName);
 
     p=extString;
-- 
2.39.5