Prepare to convert various types to size_t.

webrtc/modules/audio_coding/neteq/test/RTPencode.cc

 /*
  *  Copyright (c) 2012 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 432 matching lines @@
     return (0);
   }
 
   FILE* in_file = fopen(argv[1], "rb");
   CHECK_NOT_NULL(in_file);
   printf("Input file: %s\n", argv[1]);
   FILE* out_file = fopen(argv[2], "wb");
   CHECK_NOT_NULL(out_file);
   printf("Output file: %s\n\n", argv[2]);
   packet_size = atoi(argv[3]);
-  CHECK_NOT_NULL(packet_size);
+  if (packet_size <= 0) {
+     printf("Packet size %d must be positive", packet_size);
+     return -1;
+  }
   printf("Packet size: %i\n", packet_size);
 
   // check for stereo
   if (argv[4][strlen(argv[4]) - 1] == '*') {
     // use stereo
     usingStereo = true;
     numChannels = 2;
     argv[4][strlen(argv[4]) - 1] = '\0';
   }
 
@@ skipping 1365 matching lines @@
     memmove(ptrL + stride, ptrL, ptrR - ptrL);
 
     // copy from temp to left pointer
     memcpy(ptrL, temp, stride);
 
     // advance pointers
     ptrL += stride * 2;
     ptrR += stride;
   }
 }