From: H.G.Muller <hgm@hgm-xboard.(none)>
Date: Tue, 22 Mar 2016 08:41:44 +0000 (+0100)
Subject: Prevent crash on loading empty game file
X-Git-Url: http://winboard.nl/cgi-bin?p=xboard.git;a=commitdiff_plain;h=c3bb2a9ecf439c10d4bb03b7ac09b0773832e257

Prevent crash on loading empty game file

The parser code is made resistant to loading a file with 0 characters in it.
---

diff --git a/parser.c b/parser.c
index c2eda2b..e325005 100644
--- a/parser.c
+++ b/parser.c
@@ -404,7 +404,7 @@ NextUnit (char **p)
 
 	if(**p == NULLCHAR) { // make sure there is something to parse
 	    if(fromString) return 0; // we are parsing string, so the end is really the end
-	    *p = inPtr = inputBuf;
+	    *p = inPtr = parseStart = inputBuf;
 	    if(!ReadLine()) return 0; // EOF
 	} else if(inPtr > inputBuf + PARSEBUFSIZE/2) { // buffer fills up with already parsed stuff
 	    char *q = *p, *r = inputBuf;