with as much data as possible from 'src'.
  note: acceleration parameter is fixed to "default".

 *srcSizePtr : will be modified to indicate how many bytes where read from 'src' to fill 'dst'.
               New value is necessarily <= input value.
 @return : Nb bytes written into 'dst' (necessarily <= targetDestSize)
           or 0 if compression fails.
</p></pre><BR>

<pre><b>int LZ4_decompress_fast (const char* src, char* dst, int originalSize);
</b><p>  This function used to be a bit faster than LZ4_de