fix m_olsHrdParams in SPS class to avoid crash

[marie-pierre.gallasso]

since commit 0992b1a773f448135841e9394f263a663c2f0c71 m_olsHrdParams variable member of SPS class, is no longer an array.
But in VLCReader.cpp, in parseOlsHrdParameters function, there is a loop on maxNumSubLayersMinus1 to fill m_olsHrdParams. It seems that m_olsHrdParams can contain more than one entry.

void HLSyntaxReader::parseOlsHrdParameters(GeneralHrdParams * generalHrd, OlsHrdParams *olsHrd, uint32_t firstSubLayer, uint32_t maxNumSubLayersMinus1)
{
  uint32_t  symbol;

  for( int i = firstSubLayer; i <= maxNumSubLayersMinus1; i ++ )
  {
     OlsHrdParams *hrd = &(olsHrd[i]);
     ...
  }
}

Please modify the length of m_olsHrdParams to avoid crash.

[marie-pierre.gallasso]

fix in commit ac04ba2c2c366f2e6334054d3da8b52e8f2a5900