Revert a change made for issue #12479. This change caused a regression such that

a dial string such as (IAX2/foo) did not automatically fall back to dialing the 's'
extension anymore.

(closes issue #12770)
Reported by: dagmoller


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@119838 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_iax2.c

@@ -3235,10 +3235,7 @@ static int iax2_call(struct ast_channel *c, char *dest, int timeout)
 	}
 
 	if (!pds.exten) {
-		if (!ast_strlen_zero(c->exten))
-			pds.exten = c->exten;
-		else
-			pds.exten = defaultrdest;
+		pds.exten = defaultrdest;
 	}
 
 	if (create_addr(pds.peer, c, &sin, &cai)) {