[kernel] fix issue with hasNsProblems
[kernel] fix issue with hasNsProblems

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