Will now correctly identify the first-ever received packet as the first packet in its frame.

We used to flag the _second_ packet in the first frame as the first. Subsequent frames worked as intended.

BUG=1103
TEST=vie_auto_test --automated, rtp_rtcp_unittests

Review URL: https://webrtc-codereview.appspot.com/964020

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3164 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/rtp_rtcp/source/rtp_receiver_video.h

@@ -71,6 +71,7 @@ class RTPReceiverVideo {
       const WebRtc_UWord32 rtpTimeStamp) const  = 0;
 
   virtual WebRtc_Word8 REDPayloadType() const = 0;
+  virtual bool HaveNotReceivedPackets() const = 0;
 
   WebRtc_Word32 SetCodecType(const RtpVideoCodecTypes videoType,
                              WebRtcRTPHeader* rtpHeader) const;