the patch changes mkgmap so that it
evaluates the tags
mkgmap:road-class-min and mkgmap:road-class-max
also when mkgmap:road-class!=*

Simillarly the tags
mkgmap:road-speed-min  and mkgmap:road-speed-max
are also evaluated when mkgmap:road-speed!=*

This allows to revert the change in r3628

git-svn-id: http://svn.mkgmap.org.uk/mkgmap/trunk@3631 25d90789-57f7-4ee0-8453-03a3dfeeeb22