Fix the NetEq build

TBR=pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/20379004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5990 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/modules/audio_coding/neteq4/packet_buffer.cc b/modules/audio_coding/neteq4/packet_buffer.cc
index 33ff9a6..bcd0e7b 100644
--- a/modules/audio_coding/neteq4/packet_buffer.cc
+++ b/modules/audio_coding/neteq4/packet_buffer.cc
@@ -184,9 +184,9 @@
   if (Empty()) {
     return kBufferEmpty;
   }
-  Packet* temp_packet = buffer_.front();
   // Assert that the packet sanity checks in InsertPacket method works.
-  assert(temp_packet && temp_packet->payload);
+  assert(buffer_.front());
+  assert(buffer_.front()->payload);
   DeleteFirstPacket(&buffer_);
   return kOK;
 }