From: nethack.allison <nethack.allison>
Date: Mon, 27 Oct 2003 00:23:22 +0000 (+0000)
Subject: saving msg history glitch (trunk only)
X-Git-Tag: MOVE2GIT~1629
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=dbb1d0f230aeb9777a8f782cb2eb25eec60ae9e5;p=nethack

saving msg history glitch (trunk only)

<Someone> discovered that it is possible to
have wins[WIN_MESSAGE] be null during
a hangup, not sure why yet.

Put a guard in to prevent de-referencing a null pointer.
---

diff --git a/win/tty/topl.c b/win/tty/topl.c
index a37043c52..c1f4f06c4 100644
--- a/win/tty/topl.c
+++ b/win/tty/topl.c
@@ -469,6 +469,7 @@ boolean init;
 	register struct WinDesc *cw = wins[WIN_MESSAGE];
 	char *retstr = (char *)0;
 
+	if (!cw) return (char *)0;	/* bail */
 	/*
 	 * state 0 = normal return with string from msg history.
 	 * state 1 = finished with recall data, return toplines.