Do not send indications through ast_indicate in chan_agent but instead go directly to the technology. This way when indications are emulated they happen on the Agent channel and do not screw up formats on the channels. (issue #8439 reported by punkgode)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@54999 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_agent.c

@@ -616,7 +616,7 @@ static int agent_indicate(struct ast_channel *ast, int condition)
 	int res = -1;
 	ast_mutex_lock(&p->lock);
 	if (p->chan)
-		res = ast_indicate(p->chan, condition);
+		res = p->chan->tech->indicate ? p->chan->tech->indicate(p->chan, condition) : -1;
 	else
 		res = 0;
 	ast_mutex_unlock(&p->lock);