[mkgmap-dev] Commit r4891: add getter for tre7Magic, is needed by RgnDisplay to display Huffman encoded delta streams

Version mkgmap-r4891 was committed by gerd on Thu, 03 Feb 2022 add getter for tre7Magic, is needed by RgnDisplay to display Huffman encoded delta streams http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4891