Fixes log spam introduced with r6041.

We shouldn't return an error if we don't yet have a valid estimate.

BUG=crbug/371714
R=wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/15469006

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@6111 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/video_engine/vie_channel_manager.cc b/video_engine/vie_channel_manager.cc
index bbb7f19..6f35c24 100644
--- a/video_engine/vie_channel_manager.cc
+++ b/video_engine/vie_channel_manager.cc
@@ -416,10 +416,7 @@
   }
   std::vector<unsigned int> ssrcs;
   if (!group->GetRemoteBitrateEstimator()->LatestEstimate(
-      &ssrcs, estimated_bandwidth)) {
-    return false;
-  }
-  if (ssrcs.empty()) {
+      &ssrcs, estimated_bandwidth) || ssrcs.empty()) {
     *estimated_bandwidth = 0;
   }
   return true;