Remove the error return on SetAGC failure introduced by r3605.

BUG=webrtc:1464

Review URL: https://webrtc-codereview.appspot.com/1166005

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@3616 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/voice_engine/voe_base_impl.cc b/voice_engine/voe_base_impl.cc
index d7d78c7..864b6da 100644
--- a/voice_engine/voe_base_impl.cc
+++ b/voice_engine/voe_base_impl.cc
@@ -553,7 +553,8 @@
     if (_shared->audio_device()->SetAGC(agc_enabled) != 0) {
       LOG_FERR1(LS_ERROR, audio_device()->SetAGC, agc_enabled);
       _shared->SetLastError(VE_AUDIO_DEVICE_MODULE_ERROR);
-      return -1;
+      // TODO(ajm): No error return here due to
+      // https://code.google.com/p/webrtc/issues/detail?id=1464
     }
 #endif