fixed compilation error on windows
fixed compilation error on windows

aabadie/medInria-public,NicolasSchnitzler/medInria-public,NicolasSchnitzler/medInria-public,NicolasSchnitzler/medInria-public,aabadie/medInria-public,rdebroiz/medInria-public,rdebroiz/medInria-public,aabadie/medInria-public,rdebroiz/medInria-public