Fix build.

        data.writeInt32(sampleRate);

        data.writeInt32(format);

        data.writeInt32(channelMask);

        data.writeString16(opPackageName)

        data.writeString16(opPackageName);

        size_t frameCount = pFrameCount != NULL ? *pFrameCount : 0;

        data.writeInt64(frameCount);

        track_flags_t lFlags = flags != NULL ? *flags : (track_flags_t) TRACK_DEFAULT;