Bug fix on win32
Bug fix on win32

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