Upconvert various types to int.

Per comments from HL/kwiberg on https://webrtc-codereview.appspot.com/42569004 , when there is existing usage of mixed types (int16_t, int, etc.), we'd prefer to standardize on larger types like int and phase out use of int16_t.

Specifically, "Using int16 just because we're sure all reasonable values will fit in 16 bits isn't usually meaningful in C."

This converts some existing uses of int16_t (and, in a few cases, other types such as uint16_t) to int (or, in a few places, int32_t).  Other locations will be converted to size_t in a separate change.

BUG=none
R=andrew@webrtc.org, kwiberg@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/54629004

Cr-Commit-Position: refs/heads/master@{#9405}
diff --git a/webrtc/modules/audio_coding/codecs/ilbc/ilbc.c b/webrtc/modules/audio_coding/codecs/ilbc/ilbc.c
index 88ad33b..e41c095 100644
--- a/webrtc/modules/audio_coding/codecs/ilbc/ilbc.c
+++ b/webrtc/modules/audio_coding/codecs/ilbc/ilbc.c
@@ -88,10 +88,10 @@
   }
 }
 
-int16_t WebRtcIlbcfix_Encode(IlbcEncoderInstance* iLBCenc_inst,
-                             const int16_t* speechIn,
-                             int16_t len,
-                             uint8_t* encoded) {
+int WebRtcIlbcfix_Encode(IlbcEncoderInstance* iLBCenc_inst,
+                         const int16_t* speechIn,
+                         int16_t len,
+                         uint8_t* encoded) {
   int16_t pos = 0;
   int16_t encpos = 0;
 
@@ -141,11 +141,11 @@
 }
 
 
-int16_t WebRtcIlbcfix_Decode(IlbcDecoderInstance* iLBCdec_inst,
-                             const uint8_t* encoded,
-                             int16_t len,
-                             int16_t* decoded,
-                             int16_t* speechType)
+int WebRtcIlbcfix_Decode(IlbcDecoderInstance* iLBCdec_inst,
+                         const uint8_t* encoded,
+                         int16_t len,
+                         int16_t* decoded,
+                         int16_t* speechType)
 {
   int i=0;
   /* Allow for automatic switching between the frame sizes
@@ -194,11 +194,11 @@
   return(i*((IlbcDecoder*)iLBCdec_inst)->blockl);
 }
 
-int16_t WebRtcIlbcfix_Decode20Ms(IlbcDecoderInstance* iLBCdec_inst,
-                                 const uint8_t* encoded,
-                                 int16_t len,
-                                 int16_t* decoded,
-                                 int16_t* speechType)
+int WebRtcIlbcfix_Decode20Ms(IlbcDecoderInstance* iLBCdec_inst,
+                             const uint8_t* encoded,
+                             int16_t len,
+                             int16_t* decoded,
+                             int16_t* speechType)
 {
   int i=0;
   if ((len==((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)||
@@ -222,11 +222,11 @@
   return(i*((IlbcDecoder*)iLBCdec_inst)->blockl);
 }
 
-int16_t WebRtcIlbcfix_Decode30Ms(IlbcDecoderInstance* iLBCdec_inst,
-                                 const uint8_t* encoded,
-                                 int16_t len,
-                                 int16_t* decoded,
-                                 int16_t* speechType)
+int WebRtcIlbcfix_Decode30Ms(IlbcDecoderInstance* iLBCdec_inst,
+                             const uint8_t* encoded,
+                             int16_t len,
+                             int16_t* decoded,
+                             int16_t* speechType)
 {
   int i=0;
   if ((len==((IlbcDecoder*)iLBCdec_inst)->no_of_bytes)||