NetEq: Fix a negative shift value

webrtc/modules/audio_coding/neteq/normal.cc

Index: webrtc/modules/audio_coding/neteq/normal.cc
diff --git a/webrtc/modules/audio_coding/neteq/normal.cc b/webrtc/modules/audio_coding/neteq/normal.cc
index 1b888f70d1f9ba1c91654df1f785aedb4aae792c..9bddfe77657924f6faa389e05b021ec1b700765c 100644
--- a/webrtc/modules/audio_coding/neteq/normal.cc
+++ b/webrtc/modules/audio_coding/neteq/normal.cc
@@ -99,7 +99,8 @@ int Normal::Process(const int16_t* input,
         // We want background_noise_.energy() / energy in Q14.
         int32_t bgn_energy =
             background_noise_.Energy(channel_ix) << (scaling+14);
-        int16_t energy_scaled = static_cast<int16_t>(energy << scaling);
+        int16_t energy_scaled =
+            static_cast<int16_t>(WEBRTC_SPL_SHIFT_W32(energy, scaling));
         int32_t ratio = WebRtcSpl_DivW32W16(bgn_energy, energy_scaled);
         mute_factor = WebRtcSpl_SqrtFloor(ratio << 14);
       } else {