fix sleep to work right on unanswered channels

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4072 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_ivr.c

@@ -71,7 +71,8 @@ SWITCH_DECLARE(switch_status_t) switch_ivr_sleep(switch_core_session_t *session,
 			break;
 		}
 
-		if (switch_channel_test_flag(channel, CF_SERVICE)) {
+		if (switch_channel_test_flag(channel, CF_SERVICE) || 
+            (!switch_channel_test_flag(channel, CF_ANSWERED) && !switch_channel_test_flag(channel, CF_EARLY_MEDIA))) {
 			switch_yield(1000);
 		} else {
 			status = switch_core_session_read_frame(session, &read_frame, left, 0);