_GetInt16FromStream
fVersion = _GetInt16FromStream(fStream);
fChannels = _GetInt16FromStream(fStream);
fDepth = _GetInt16FromStream(fStream);
fColorFormat = _GetInt16FromStream(fStream);
uint16 resID = _GetInt16FromStream(fStream);
fTransparentIndex = _GetInt16FromStream(fStream);
fCompression = _GetInt16FromStream(fStream);
int16 _GetInt16FromStream(BPositionIO *in);