[kernel] avoid double free on _numericsMatrix->matrix0 (correction)
[kernel] avoid double free on _numericsMatrix->matrix0 (correction)

siconos/siconos,siconos/siconos,siconos/siconos,radarsat1/siconos,siconos/siconos,radarsat1/siconos,radarsat1/siconos,radarsat1/siconos,radarsat1/siconos