From c1b9030aaa484cebf8df7e2bb7559d93a9e0700d Mon Sep 17 00:00:00 2001
From: Ulf Wohlers <finsterr@users.sourceforge.net>
Date: Wed, 21 Aug 2002 18:24:50 +0000
Subject: [PATCH] Fixed small bug in isvalid. Not all illegal chars were
 recognized.

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@200
---
 src/dos/dos_files.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/dos/dos_files.cpp b/src/dos/dos_files.cpp
index e0299d0e..f1484048 100644
--- a/src/dos/dos_files.cpp
+++ b/src/dos/dos_files.cpp
@@ -504,7 +504,7 @@ static bool FCB_MakeName (DOS_FCB* fcb, char* outname, Bit8u* outdrive){
 static bool isvalid(const char* in){
     
 	const char ill[]=ILLEGAL;    
-	return (*in>0x1F) && (strchr(ill,*in)==0);
+	return (Bit8u(*in)>0x1F) && (strchr(ill,*in)==0);
 }
 
 static void vullen (char* veld,char* pveld){