Replace calls to assert() with RTC_DCHECK_*() in .c code

webrtc/modules/audio_coding/codecs/isac/fix/source/encode.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.
  */
 
 /*
  * encode.c
  *
  * Encoding function for the iSAC coder.
  *
  */
 
+#include "webrtc/base/checks.h"
 #include "webrtc/modules/audio_coding/codecs/isac/fix/source/codec.h"
 
-#include <assert.h>
 #include <stdio.h>
 
 #include "webrtc/modules/audio_coding/codecs/isac/fix/source/arith_routins.h"
 #include "webrtc/modules/audio_coding/codecs/isac/fix/source/bandwidth_estimator.h"
 #include "webrtc/modules/audio_coding/codecs/isac/fix/source/entropy_coding.h"
 #include "webrtc/modules/audio_coding/codecs/isac/fix/source/lpc_masking_model.h"
 #include "webrtc/modules/audio_coding/codecs/isac/fix/source/lpc_tables.h"
 #include "webrtc/modules/audio_coding/codecs/isac/fix/source/pitch_estimator.h"
 #include "webrtc/modules/audio_coding/codecs/isac/fix/source/pitch_gain_tables.h"
 #include "webrtc/modules/audio_coding/codecs/isac/fix/source/pitch_lag_tables.h"
@@ skipping 417 matching lines @@
       MinBytes = usefulstr_len + 255;
     }
 
     /* Save data for creation of multiple bitstreams */
     if (ISACenc_obj->SaveEnc_ptr != NULL) {
       (ISACenc_obj->SaveEnc_ptr)->minBytes = MinBytes;
     }
 
     while (stream_length < MinBytes)
     {
-      assert(stream_length >= 0);
+      RTC_DCHECK_GE(stream_length, 0);
       if (stream_length & 0x0001){
         ISACenc_obj->bitstr_seed = WEBRTC_SPL_RAND( ISACenc_obj->bitstr_seed );
         ISACenc_obj->bitstr_obj.stream[stream_length / 2] |=
             (uint16_t)(ISACenc_obj->bitstr_seed & 0xFF);
       } else {
         ISACenc_obj->bitstr_seed = WEBRTC_SPL_RAND( ISACenc_obj->bitstr_seed );
         ISACenc_obj->bitstr_obj.stream[stream_length / 2] =
             ((uint16_t)ISACenc_obj->bitstr_seed << 8);
       }
       stream_length++;
@@ skipping 157 matching lines @@
     if (status < 0) {
       return status;
     }
   }
 
   /* complete arithmetic coding */
   stream_length = WebRtcIsacfix_EncTerminate(&ISACenc_obj->bitstr_obj);
 
   return stream_length;
 }