Update a ton of audio code to use size_t more correctly and in general reduce

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

Index: webrtc/modules/audio_coding/codecs/ilbc/get_cd_vec.c
diff --git a/webrtc/modules/audio_coding/codecs/ilbc/get_cd_vec.c b/webrtc/modules/audio_coding/codecs/ilbc/get_cd_vec.c
index cf05ce3310a2587e1c2e2329418813d5b45e3353..d7c2e75553b8e5225ace669f2fb258e0d5215c8e 100644
--- a/webrtc/modules/audio_coding/codecs/ilbc/get_cd_vec.c
+++ b/webrtc/modules/audio_coding/codecs/ilbc/get_cd_vec.c
@@ -27,12 +27,12 @@
 void WebRtcIlbcfix_GetCbVec(
     int16_t *cbvec,   /* (o) Constructed codebook vector */
     int16_t *mem,   /* (i) Codebook buffer */
-    int16_t index,   /* (i) Codebook index */
-    int16_t lMem,   /* (i) Length of codebook buffer */
-    int16_t cbveclen   /* (i) Codebook vector length */
+    size_t index,   /* (i) Codebook index */
+    size_t lMem,   /* (i) Length of codebook buffer */
+    size_t cbveclen   /* (i) Codebook vector length */
                             ){
-  int16_t k, base_size;
-  int16_t lag;
+  size_t k, base_size;
+  size_t lag;
   /* Stack based */
   int16_t tempbuff2[SUBL+5];
 
@@ -58,7 +58,7 @@ void WebRtcIlbcfix_GetCbVec(
 
     /* Calculate lag */
 
-    k = (int16_t)(2 * (index - (lMem - cbveclen + 1))) + cbveclen;
+    k = (2 * (index - (lMem - cbveclen + 1))) + cbveclen;
 
     lag = k / 2;
 
@@ -70,7 +70,7 @@ void WebRtcIlbcfix_GetCbVec(
 
   else {
 
-    int16_t memIndTest;
+    size_t memIndTest;
 
     /* first non-interpolated vectors */
 
@@ -100,7 +100,7 @@ void WebRtcIlbcfix_GetCbVec(
       /* do filtering */
       WebRtcSpl_FilterMAFastQ12(
           &mem[memIndTest+7], tempbuff2, (int16_t*)WebRtcIlbcfix_kCbFiltersRev,
-          CB_FILTERLEN, (int16_t)(cbveclen+5));
+          CB_FILTERLEN, cbveclen+5);
 
       /* Calculate lag index */
       lag = (cbveclen<<1)-20+index-base_size-lMem-1;