[mkgmap-dev] Commit r4663: stop if the path given with --output-dir is not a directory or doesn't exist and cannot be created

Version mkgmap-r4663 was committed by gerd on Fri, 16 Apr 2021 stop if the path given with --output-dir is not a directory or doesn't exist and cannot be created http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4663