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

webrtc/modules/audio_coding/codecs/isac/isac_test.gypi

 # 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.
 
 {
   'targets': [
     # simple kenny
     {
       'target_name': 'isac_test',
       'type': 'executable',
       'dependencies': [
         'isac',
         '<(webrtc_root)/base/base.gyp:rtc_base',
       ],
       'include_dirs': [
         './main/include',
         './main/test',
         './main/util',
         '<(webrtc_root)',
       ],
       'sources': [
+        'empty.cc',  # force build system to use C++ linker

[ossu, 2016/08/25 13:38:22]

Why?

[kwiberg-webrtc, 2016/08/25 16:53:10]

Because simplicity, the C RTC_DCHECK macro calls the same function as the C++
RTC_DCHECK macro. It uses a bunch of stuff from the C++ standard library.

This is only a problem for a tiny number of test binaries like this one whose
top level code is in C.

         './main/test/simpleKenny.c',
         './main/util/utility.c',
       ],
       'conditions': [
         ['OS=="win" and clang==1', {
           'msvs_settings': {
             'VCCLCompilerTool': {
               'AdditionalOptions': [
                 # Disable warnings failing when compiling with Clang on Windows.
                 # https://bugs.chromium.org/p/webrtc/issues/detail?id=5366
@@ skipping 36 matching lines @@
         './main/util',
         '<(webrtc_root)',
       ],
       'sources': [
         './main/test/SwitchingSampRate/SwitchingSampRate.cc',
         './main/util/utility.c',
       ],
     },
   ],
 }