[mkgmap-dev] Commit r4171: fix possible java.lang.AssertionError introduced with r4169

Version mkgmap-r4171 was committed by gerd on Sat, 21 Apr 2018 fix possible java.lang.AssertionError introduced with r4169 nodecount has more than 8 bits http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4171