Convert some more things to size_t.

webrtc/modules/audio_coding/codecs/ilbc/frame_classify.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 64 matching lines @@
   } else {
     ssqPtr=(int16_t*)WebRtcIlbcfix_kStartSequenceEnrgWin;
   }
   for (n=(iLBCenc_inst->nsub-1); n>0; n--) {
     (*seqEnPtr)=WEBRTC_SPL_MUL(((*seqEnPtr)>>scale1), (*ssqPtr));
     seqEnPtr++;
     ssqPtr++;
   }
 
   /* Extract the best choise of start state */
-  pos = (size_t)WebRtcSpl_MaxIndexW32(ssqEn, iLBCenc_inst->nsub - 1) + 1;
+  pos = WebRtcSpl_MaxIndexW32(ssqEn, iLBCenc_inst->nsub - 1) + 1;
 
   return(pos);
 }