Fix the include guard in transmit_mixer.h

R=henrika@webrtc.org, stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/5879004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5334 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/voice_engine/transmit_mixer.h b/webrtc/voice_engine/transmit_mixer.h
index 7ff298d..0f70312 100644
--- a/webrtc/voice_engine/transmit_mixer.h
+++ b/webrtc/voice_engine/transmit_mixer.h
@@ -245,4 +245,4 @@
 
 }  // namespace webrtc
 
-#endif  // WEBRTC_VOICE_ENGINE_TRANSMIT_MIXER_H
\ No newline at end of file
+#endif  // WEBRTC_VOICE_ENGINE_TRANSMIT_MIXER_H