[mkgmap-dev] Commit r4131: refactoring, no functional change

Version mkgmap-r4131 was committed by gerd on Thu, 08 Mar 2018 refactoring, no functional change - move debug code from WrongAngleFixer to optional class in DebugWriter http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4131