[kernel] fix bug in levels of MoreauJeanOSI. BB is now working again
[kernel] fix bug in levels of MoreauJeanOSI. BB is now working again

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