WebRtcIsac_Encode and WebRtcIsacfix_Encode: Type encoded stream as uint8_t

We have to fix both at once, since there's a macro that calls one of
them or the other.

BUG=909
R=andrew@webrtc.org, bjornv@webrtc.org, henrik.lundin@webrtc.org, minyue@webrtc.org

Committed: https://code.google.com/p/webrtc/source/detail?r=7266

Review URL: https://webrtc-codereview.appspot.com/19229004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7285 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_coding/codecs/isac/main/interface/isac.h

@@ -147,7 +147,7 @@ extern "C" {
   int16_t WebRtcIsac_Encode(
       ISACStruct*        ISAC_main_inst,
       const int16_t* speechIn,
-      int16_t*       encoded);
+      uint8_t* encoded);
 
 
   /******************************************************************************