put PDAL_HAVE_GDAL guard around setSpatialReference call in BPF reader
put PDAL_HAVE_GDAL guard around setSpatialReference call in BPF reader

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