win32 build fix
win32 build fix

mpgerlek/PDAL-old,mtCarto/PDAL,Sciumo/PDAL,radiantbluetechnologies/PDAL,mtCarto/PDAL,Sciumo/PDAL,mpgerlek/PDAL-old,verma/PDAL,boundlessgeo/PDAL,radiantbluetechnologies/PDAL,jwomeara/PDAL,radiantbluetechnologies/PDAL,Sciumo/PDAL,mpgerlek/PDAL-old,verma/PDAL,verma/PDAL,DougFirErickson/PDAL,boundlessgeo/PDAL,lucadelu/PDAL,DougFirErickson/PDAL,mpgerlek/PDAL-old,jwomeara/PDAL,jwomeara/PDAL,radiantbluetechnologies/PDAL,boundlessgeo/PDAL,verma/PDAL,lucadelu/PDAL,DougFirErickson/PDAL,lucadelu/PDAL,Sciumo/PDAL,mtCarto/PDAL,verma/PDAL,boundlessgeo/PDAL,jwomeara/PDAL,DougFirErickson/PDAL,verma/PDAL,mtCarto/PDAL,lucadelu/PDAL,verma/PDAL