Workaround for false positive -Wmaybe-uninitialized being triggered on some compilers

webrtc/modules/audio_coding/codecs/isac/main/source/encode_lpc_swb.c

 /*
  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 422 matching lines @@
 int16_t
 WebRtcIsac_CorrelateInterVec(
     const double* data,
     double*       out,
     int16_t bandwidth)
 {
   int16_t coeffCntr;
   int16_t rowCntr;
   int16_t colCntr;
   int16_t interVecDim;
-  double myVec[UB16_LPC_VEC_PER_FRAME];
+  double myVec[UB16_LPC_VEC_PER_FRAME] = {0.0};
   const double* interVecDecorrMat;
 
   switch(bandwidth)
   {
     case isac12kHz:
       {
         interVecDim       = UB_LPC_VEC_PER_FRAME;
         interVecDecorrMat = &WebRtcIsac_kInterVecDecorrMatUb12[0][0];
         break;
       }
@@ skipping 245 matching lines @@
 int16_t WebRtcIsac_AddMeanToLinearDomain(
     double* lpcGains)
 {
   int16_t coeffCntr;
   for(coeffCntr = 0; coeffCntr < UB_LPC_GAIN_DIM; coeffCntr++)
   {
     lpcGains[coeffCntr] = exp(lpcGains[coeffCntr] + WebRtcIsac_kMeanLpcGain);
   }
   return 0;
 }