Fixe ticket 134 VTM can result in different results on different platforms

Due to the following code related to 6-param affine, uiBits[1] is not properly initialized sometimes, which leads to different coding results.

  if ( pu.cu->affineType == AFFINEMODEL_6PARAM && refIdx4Para[iRefList] != iRefIdxTemp )
  {
    xCopyAffineAMVPInfo( affiAMVPInfoTemp[eRefPicList], aacAffineAMVPInfo[iRefList][iRefIdxTemp] );
    continue;
  }