Base ackcall on newly available agent, not the pending one

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@1469 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_agent.c

@@ -788,7 +788,7 @@ static int check_availability(struct agent_pvt *newlyavailable, int needlock)
 	if (needlock)
 		ast_mutex_unlock(&agentlock);
 	if (parent && chan)  {
-		if (p->ackcall > 1) {
+		if (newlyavailable->ackcall > 1) {
 			/* Don't do beep here */
 			res = 0;
 		} else {