[Numerics] fix csi <-> int conversions (fclib is not compatible anymore with Numerics)
[Numerics] fix csi <-> int conversions (fclib is not compatible anymore with Numerics)

fperignon/siconos,radarsat1/siconos,bremond/siconos,bremond/siconos,bremond/siconos,siconos/siconos,fperignon/siconos,siconos/siconos-deb,siconos/siconos-deb,bremond/siconos,radarsat1/siconos,siconos/siconos,radarsat1/siconos,fperignon/siconos,siconos/siconos-deb,siconos/siconos,siconos/siconos-deb,bremond/siconos,fperignon/siconos,siconos/siconos-deb,radarsat1/siconos,siconos/siconos-deb,radarsat1/siconos,fperignon/siconos,siconos/siconos