From: Art Cancro <ajc@citadel.org>
Date: Fri, 17 Apr 2009 16:46:34 +0000 (+0000)
Subject: * Don't attempt to evaluate (ptr-1) when ptr is already at the beginning of the buffer.
X-Git-Tag: v7.86~1250
X-Git-Url: https://code.citadel.org/?p=citadel.git;a=commitdiff_plain;h=437c6ded80e7f56d88e7fd4f1cda067cf3360551

* Don't attempt to evaluate (ptr-1) when ptr is already at the beginning of the buffer.
---

diff --git a/webcit/html2html.c b/webcit/html2html.c
index c1c2b64a5..289a7e51f 100644
--- a/webcit/html2html.c
+++ b/webcit/html2html.c
@@ -502,10 +502,10 @@ void output_html(const char *supplied_charset, int treat_as_wiki, int msgnum, St
 		 * so we don't turn things that look like URL's into
 		 * links, when they're already links - or image sources.
 		 */
-		if (*(ptr-1) == '<') {
+		if ((ptr > msg) && (*(ptr-1) == '<')) {
 			++brak;
 		}
-		if (*(ptr-1) == '>') {
+		if ((ptr > msg) && (*(ptr-1) == '>')) {
 			--brak;
 			if ((scriptlevel == 0) && (script_start_pos >= 0)) {
 				StrBufCutRight(converted_msg, StrLength(converted_msg) - script_start_pos);