[mkgmap-dev] Commit r4178: remove assertions to fix possible assertionError introduced with r4167:

Version mkgmap-r4178 was committed by gerd on Wed, 25 Apr 2018 remove assertions to fix possible assertionError introduced with r4167: java.lang.AssertionError: minlong=-8388608 http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4178