Update audio code to use size_t more correctly,

webrtc/modules/audio_coding/codecs/ilbc/create_augmented_vec.c

Index: webrtc/modules/audio_coding/codecs/ilbc/create_augmented_vec.c
diff --git a/webrtc/modules/audio_coding/codecs/ilbc/create_augmented_vec.c b/webrtc/modules/audio_coding/codecs/ilbc/create_augmented_vec.c
index 965cbe0d394e71965c8a0bd12b36771a7d722d44..8ae28ac3b9962735069b2b5d6db1d3b4ae49edbc 100644
--- a/webrtc/modules/audio_coding/codecs/ilbc/create_augmented_vec.c
+++ b/webrtc/modules/audio_coding/codecs/ilbc/create_augmented_vec.c
@@ -25,12 +25,12 @@
  *----------------------------------------------------------------*/
 
 void WebRtcIlbcfix_CreateAugmentedVec(
-    int16_t index,  /* (i) Index for the augmented vector to be created */
+    size_t index,  /* (i) Index for the augmented vector to be created */
     int16_t *buffer,  /* (i) Pointer to the end of the codebook memory that
                                            is used for creation of the augmented codebook */
     int16_t *cbVec  /* (o) The construced codebook vector */
                                       ) {
-  int16_t ilow;
+  size_t ilow;
   int16_t *ppo, *ppi;
   int16_t cbVecTmp[4];