add -Wextra
add -Wextra

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