[Numerics] add allocation of blocks if we copy a SBM matrix
[Numerics] add allocation of blocks if we copy a SBM matrix

fperignon/siconos,fperignon/siconos,siconos/siconos,siconos/siconos,radarsat1/siconos,radarsat1/siconos,radarsat1/siconos,bremond/siconos,fperignon/siconos,siconos/siconos,radarsat1/siconos,bremond/siconos,siconos/siconos,bremond/siconos,fperignon/siconos,fperignon/siconos,radarsat1/siconos,bremond/siconos,bremond/siconos