[mechanics io] fix usage of tmpfile in vview
[mechanics io] fix usage of tmpfile in vview

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