try to test for log's existence before hitting callback
try to test for log's existence before hitting callback

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