fixes issue with channels not going down after transfer

Iax2 currently does not support native bridging if the timeoutms value is set.  We check for that in iax2_bridge, but then set timeoutms to 0 by default.  If the timeoutms is not provided it is set to -1. By setting timeoutms to 0 it is processed causing a bridging retry loop.

(closes issue #15216)
Reported by: oxymoron
Tested by: dvossel


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@198824 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_iax2.c

@@ -4277,7 +4277,7 @@ static enum ast_bridge_result iax2_bridge(struct ast_channel *c0, struct ast_cha
 		return AST_BRIDGE_FAILED;
 	}
 
-	timeoutms = 0;
+	timeoutms = -1;
 
 	lock_both(callno0, callno1);
 	if (!iaxs[callno0] || !iaxs[callno1]) {