Change import_array() call to deal with python 3.
Change import_array() call to deal with python 3.

Sciumo/PDAL,radiantbluetechnologies/PDAL,mpgerlek/PDAL-old,radiantbluetechnologies/PDAL,lucadelu/PDAL,mpgerlek/PDAL-old,boundlessgeo/PDAL,mtCarto/PDAL,mtCarto/PDAL,mpgerlek/PDAL-old,boundlessgeo/PDAL,mpgerlek/PDAL-old,Sciumo/PDAL,mtCarto/PDAL,radiantbluetechnologies/PDAL,mtCarto/PDAL,radiantbluetechnologies/PDAL,boundlessgeo/PDAL,Sciumo/PDAL,lucadelu/PDAL,Sciumo/PDAL,lucadelu/PDAL,lucadelu/PDAL,boundlessgeo/PDAL