Fixes warning message caused by confbridge playback chan not being answered.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@325937 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_bridge.c

@@ -229,6 +229,9 @@ static struct ast_channel *bridge_request(const char *type, struct ast_format_ca
 	ast_format_copy(&p->input->rawwriteformat, &slin);
 	ast_format_copy(&p->output->rawwriteformat, &slin);
 
+	ast_answer(p->output);
+	ast_answer(p->input);
+
 	return p->input;
 }