From: Byrial Jensen <byrial@vip.cybercity.dk>
Date: Sun, 18 Dec 2011 12:26:20 +0000 (+0100)
Subject: Fix a possible crash in the file browser
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=7e695010e3a0d264b6532d00d9360e3f9fb09686;p=xboard.git

Fix a possible crash in the file browser

If the OK button was selected in the file browser when no file was selected
there was a read out of bounds which could crash xboard
---

diff --git a/filebrowser/selfile.c b/filebrowser/selfile.c
index e6edfe4..729453b 100644
--- a/filebrowser/selfile.c
+++ b/filebrowser/selfile.c
@@ -883,7 +883,7 @@ XsraSelFile(toplevel, prompt, ok, cancel, failed,
 				SFprepareToReturn();
 				return stderr;
 			}
-			if ((*name_return)[strlen(*name_return)-1] != '/' &&         // [HGM] refuse directories
+			if ((!(*name_return)[0] || (*name_return)[strlen(*name_return)-1] != '/') &&      // [HGM] refuse directories
 			    (fp = SFopenFile(*name_return, mode, prompt, failed))) {
 				SFprepareToReturn();
 				return fp;