From 8edb39db30a2f80c247148cb6853d8bd44967c26 Mon Sep 17 00:00:00 2001
From: "pwestin@webrtc.org"
 <pwestin@webrtc.org@4adac7df-926f-26a2-2b94-8c16560cd09d>
Date: Thu, 22 Dec 2011 07:40:33 +0000
Subject: [PATCH] Prevent sending empty RTCP packet. Review URL:
 http://webrtc-codereview.appspot.com/331009

git-svn-id: http://webrtc.googlecode.com/svn/trunk@1277 4adac7df-926f-26a2-2b94-8c16560cd09d
---
 src/modules/rtp_rtcp/source/rtcp_sender.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/modules/rtp_rtcp/source/rtcp_sender.cc b/src/modules/rtp_rtcp/source/rtcp_sender.cc
index 2ab8ed2b99..4200aae7f9 100644
--- a/src/modules/rtp_rtcp/source/rtcp_sender.cc
+++ b/src/modules/rtp_rtcp/source/rtcp_sender.cc
@@ -2010,7 +2010,11 @@ RTCPSender::SendRTCP(const WebRtc_UWord32 packetTypeFlags,
             }
         }
     }while (false);
-
+    // Sanity don't send empty packets.
+    if (pos == 0)
+    {
+        return -1;
+    }
     return SendToNetwork(rtcpbuffer, (WebRtc_UWord16)pos);
 }