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

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

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7266 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_coding/main/acm2/acm_isac.cc

@@ -347,8 +347,9 @@ int16_t ACMISAC::InternalEncode(uint8_t* bitstream,
       return -1;
     }
     *bitstream_len_byte = ACM_ISAC_ENCODE(
-        codec_inst_ptr_->inst, &in_audio_[in_audio_ix_read_],
-        reinterpret_cast<int16_t*>(bitstream));
+        codec_inst_ptr_->inst,
+        &in_audio_[in_audio_ix_read_],
+        bitstream);
     // increment the read index this tell the caller that how far
     // we have gone forward in reading the audio buffer
     in_audio_ix_read_ += samples_in_10ms_audio_;