Check to see if the channel that is activating the IAXPEER function is actually

an IAX2 channel before proceeding to process it to avoid crashing.
(issue #8017, reported by admott, fixed by myself)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@43552 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_iax2.c

@@ -9342,6 +9342,11 @@ static char *function_iaxpeer(struct ast_channel *chan, char *cmd, char *data, c
 	char *peername, *colname;
 	char iabuf[INET_ADDRSTRLEN];
 
+	buf[0] = '\0';
+
+	if (chan->tech != &iax2_tech)
+		return buf;
+
 	if (!(peername = ast_strdupa(data))) {
 		ast_log(LOG_ERROR, "Memory Error!\n");
 		return ret;